Share Repurchases (Details) (USD $)	1 Months Ended	12 Months Ended
	Oct. 19, 2012	Dec. 31, 2012	Dec. 31, 2011
Share Repurchases [Abstract]
Share repurchase program amount authorized, maximum		$ 60,000,000
Share repurchases [Abstract]
Total Number of Shares Purchased (in shares)	0	0
Average Price Paid per Share (in dollars per share)	$ 0
Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (in shares)	2,254,953	2,254,953	2,254,953
Maximum Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs	$ 0