Stock Repurchases (Details) (USD $)	0 Months Ended		12 Months Ended
	Jun. 22, 2013	Jun. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Repurchases [Abstract]
Stock Repurchase Program, Authorized Repurchase Amount	$ 100,000,000	$ 100,000,000
Stock Repurchased During Period, Shares			250,900	983,818	3,510,973
Payments for Repurchase of Common Stock			(2,492,000)	(18,374,000)	(63,659,000)
Stock Repurchase Program, Remaining Authorized Repurchase Amount			$ 102,900,000