Stock-Based Compensation, Common Stock Repurchases and Dividends Schedule of Quarterly Dividends (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend Per Share	$ 0	$ 0.17	$ 0.17	$ 0.17		$ 0.51
Total Dividends Paid (value)	$ 0	$ 1,712	$ 1,730	$ 1,738	$ 0	$ 5,180	$ 4,595