Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 01, 2015	Sep. 30, 2001
Share Repurchases [Abstract]
Stock Repurchase Shares Authorized	4,200			4,800	15,400
Treasury Stock, Shares, Acquired	3,757	0
Repurchases of common stock	$ 74,024	$ 0	$ 0
Payments of Dividends	$ 6,900	$ 7,000	$ 6,900