Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Unrealized loss on derivatives, tax benefit	$ 8,799
Cash dividends declared per share | $ / shares	$ 0.84
Repurchase of treasury stock, Shares | shares	835,968
Accumulated Other Comprehensive (Loss) Income [Member]
Unrealized loss on derivatives, tax benefit	$ 8,799