CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Dividends on common stock, per share	$ 0.19	$ 0.15
Common Stock [Member]
Stock purchased under stock repurchase plan, shares	1,040,612	102,843
Issuance of common stock under Dividend Reinvestment Plans, shares		15,781
Vesting of restricted stock under Equity Compensation Plans, shares	30,299	19,271
Issuance of common stock under Equity Compensation Plan , shares	21,804	7,686
Issuance of common stock for services rendered, shares	4,400	4,576
Retained Earnings [Member]
Dividends on common stock, per share	$ 0.19	$ 0.15
Accumulated Other Comprehensive Income (Loss) [Member]
Other comprehensive income (loss), tax	$ 1,502	$ 2,115