Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical)

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]    
Other comprehensive income (loss), tax $ 3,411 $ 1,801
Issuance of common stock, acquisition, shares 17,232  
Dividends on common stock, per share (in usd per share) $ 0.38 $ 0.32
Stock purchased under stock repurchase plan, shares 1,312,556 181,356
Issuance of common stock under Dividend Reinvestment Plans, shares   33,710
Issuance of common stock under Equity Compensation Plan , shares 34,227 25,873
Issuance of common stock for services rendered, shares 9,552 9,200
Vesting of restricted stock under Equity Compensation Plans, shares 31,993 20,049