Common Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Oct. 27, 2014
Disclosure of Repurchase Agreements [Abstract]
Stock Repurchase Program, Authorized Amount			$ 100,000
Treasury Stock Acquired During Period, Shares	1,250,000	1,000,000
Treasury Stock Acquired, Average Cost Per Share	$ 17.15
Treasury Stock, Value, Acquired, Cost Method	$ 21,438	$ 19,270