Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unrealized gain (loss) on derivatives tax (benefit) expense	$ (6,115)	$ (286)
Cash dividends declared per share	$ 0.84	$ 0.62	$ 0.60
Repurchase of treasury stock, Shares	2,413,803	2,605,970	1,500,000
Accumulated Other Comprehensive (Loss) Income [Member]
Unrealized gain (loss) on derivatives tax (benefit) expense	$ (6,115)	$ (286)	$ 632