Share Repurchase Programs (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 December Two Thousand Thirteen Anti Dilutive Share Repurchase Program [Member] [Domain]	Dec. 31, 2012 December Two Thousand Eleven Anti Dilutive Share Repurchase Program [Member] [Member]	Dec. 31, 2013 December Two Thousand Eleven Anti Dilutive Share Repurchase Program [Member] [Member]	Dec. 31, 2011 December 2009 Anti-Dilutive Share Repurchase Program [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]
Share Repurchase Programs (Textual) [Abstract]
Repurchased and retired shares							543,923	1,175,783
Aggregate cost of repurchased and retired	$ 26,343	$ 59,102		$ 26,000		$ (59,000)	$ 272	$ 588
Maximum number of share repurchases authorization			2,000,000		2,000,000