Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details)

v3.3.0.814
FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
ASSETS:    
Interest rate swap $ 5,470 $ 2,681
Cash flow hedges 1,553 580
Estimated Fair Value 888,692 1,102,114
LIABILITIES:    
Interest rate swap 5,470 2,681
Cash flow hedges $ 11,911 8,433
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Interest rate swap  
Cash flow hedges  
Estimated Fair Value  
LIABILITIES:    
Interest rate swap  
Cash flow hedges  
Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Interest rate swap $ 5,470 2,681
Cash flow hedges 1,553 580
Estimated Fair Value 888,692 1,102,114
LIABILITIES:    
Interest rate swap 5,470 2,681
Cash flow hedges $ 11,911 8,433
Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Interest rate swap  
Cash flow hedges  
Estimated Fair Value  
LIABILITIES:    
Interest rate swap  
Cash flow hedges  
Recurring [Member]    
ASSETS:    
Interest rate swap $ 5,470 2,681
Cash flow hedges 1,553 580
LIABILITIES:    
Interest rate swap 5,470 2,681
Cash flow hedges $ 11,911 $ 8,433
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Interest rate swap
Cash flow hedges
LIABILITIES:    
Interest rate swap
Cash flow hedges
Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Interest rate swap $ 5,470 $ 2,681
Cash flow hedges 1,553 580
LIABILITIES:    
Interest rate swap 5,470 2,681
Cash flow hedges $ 11,911 $ 8,433
Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Interest rate swap
Cash flow hedges
LIABILITIES:    
Interest rate swap
Cash flow hedges
US Government Agencies Debt Securities [Member]    
ASSETS:    
Estimated Fair Value $ 8,411 $ 8,454
US Government Agencies Debt Securities [Member] | Recurring [Member]    
ASSETS:    
Estimated Fair Value $ 8,411 $ 8,454
US Government Agencies Debt Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Estimated Fair Value
US Government Agencies Debt Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Estimated Fair Value $ 8,411 $ 8,454
US Government Agencies Debt Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Estimated Fair Value
Obligations of States and Political Subdivisions [Member]    
ASSETS:    
Estimated Fair Value $ 249,893 $ 445,647
Obligations of States and Political Subdivisions [Member] | Recurring [Member]    
ASSETS:    
Estimated Fair Value $ 249,893 $ 445,647
Obligations of States and Political Subdivisions [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Estimated Fair Value
Obligations of States and Political Subdivisions [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Estimated Fair Value $ 249,893 $ 445,647
Obligations of States and Political Subdivisions [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Estimated Fair Value
Corporate and Other Securities [Member]    
ASSETS:    
Estimated Fair Value $ 72,462 $ 78,680
Corporate and Other Securities [Member] | Recurring [Member]    
ASSETS:    
Estimated Fair Value $ 72,462 $ 78,680
Corporate and Other Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Estimated Fair Value
Corporate and Other Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Estimated Fair Value $ 72,462 $ 78,680
Corporate and Other Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Estimated Fair Value
Mortgage Backed Securities [Member]    
ASSETS:    
Estimated Fair Value $ 547,717 $ 559,329
Mortgage Backed Securities [Member] | Recurring [Member]    
ASSETS:    
Estimated Fair Value $ 547,717 $ 559,329
Mortgage Backed Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Estimated Fair Value
Mortgage Backed Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Estimated Fair Value $ 547,717 $ 559,329
Mortgage Backed Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Estimated Fair Value
Other Securities [Member]    
ASSETS:    
Estimated Fair Value $ 10,209 $ 10,004
Other Securities [Member] | Recurring [Member]    
ASSETS:    
Estimated Fair Value $ 10,209 $ 10,004
Other Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Estimated Fair Value
Other Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Estimated Fair Value $ 10,209 $ 10,004
Other Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Estimated Fair Value
Best Effort Forward Delivery Commitments [Member]    
LIABILITIES:    
Liabilities $ 544  
Best Effort Forward Delivery Commitments [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
LIABILITIES:    
Liabilities  
Best Effort Forward Delivery Commitments [Member] | Significant Other Observable Inputs Level 2 [Member]    
LIABILITIES:    
Liabilities  
Best Effort Forward Delivery Commitments [Member] | Significant Unobservable Inputs Level 3 [Member]    
LIABILITIES:    
Liabilities $ 544  
Best Effort Forward Delivery Commitments [Member] | Recurring [Member]    
LIABILITIES:    
Liabilities $ 544  
Best Effort Forward Delivery Commitments [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
LIABILITIES:    
Liabilities  
Best Effort Forward Delivery Commitments [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
LIABILITIES:    
Liabilities $ 544  
Interest Rate Lock Commitments [Member]    
ASSETS:    
Derivative assets $ 1,321 $ 513
Interest Rate Lock Commitments [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Derivative assets  
Interest Rate Lock Commitments [Member] | Significant Other Observable Inputs Level 2 [Member]    
ASSETS:    
Derivative assets  
Interest Rate Lock Commitments [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Derivative assets $ 1,321 513
Interest Rate Lock Commitments [Member] | Recurring [Member]    
ASSETS:    
Derivative assets $ 1,321 $ 513
Interest Rate Lock Commitments [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]    
ASSETS:    
Derivative assets
Interest Rate Lock Commitments [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]    
ASSETS:    
Derivative assets $ 1,321 $ 513