Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unrealized loss on derivatives, tax benefit	$ (2,713)	$ (6,115)
Cash dividends declared per share	$ 0.73	$ 0.84	$ 0.62
Repurchase of treasury stock, Shares		2,413,803	2,605,970
Accumulated Other Comprehensive Income (Loss) [Member]
Unrealized loss on derivatives, tax benefit	$ (2,713)	$ (6,115)	$ (286)