Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v2.4.0.6
Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Commitments with off-balance sheet risk:      
Total commitments with off-balance sheet risk $ 1,077,906 $ 1,023,628  
Commitments with balance sheet risk:      
Loans held for sale 127,106 167,698 73,575
Total other commitments 1,205,012 1,191,326  
Commitments to extend credit [Member]
     
Commitments with off-balance sheet risk:      
Total commitments with off-balance sheet risk 888,856 844,766  
Standby letters of credit [Member]
     
Commitments with off-balance sheet risk:      
Total commitments with off-balance sheet risk 53,690 45,536  
Mortgage loan rate lock commitments [Member]
     
Commitments with off-balance sheet risk:      
Total commitments with off-balance sheet risk $ 135,360 $ 133,326