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
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]    
Other comprehensive income (loss), tax $ 7,148 $ 3,018
Issuance of common stock, acquisition, shares 21,922,077  
Dividends on common stock, per share (in usd per share) $ 0.65 $ 0.60
Issuance of common stock under Equity Compensation Plan , shares 120,030 58,421
Issuance of common stock for services rendered, shares 17,421 16,529
Vesting of restricted stock under Equity Compensation Plans, shares 81,832 76,505