Subsequent Events (Details) (USD $)							0 Months Ended
	Dec. 31, 2013	Jan. 19, 2011	Jan. 09, 2014 Subsequent Event	Jan. 09, 2014 Revolving Credit Facility Subsequent Event	Feb. 21, 2014 Term Loan Subsequent Event	Jan. 09, 2014 Term Loan Subsequent Event	Jan. 09, 2014 Line of Credit Revolving Credit Facility Subsequent Event Extension_Option	Jan. 09, 2014 Line of Credit Term Loan Subsequent Event Extension_Option
Subsequent Event [Line Items]
Revolving credit facility borrowing limit, maximum borrowing capacity		$ 250,000,000.0	$ 350,000,000	$ 250,000,000		$ 100,000,000
Number of extensions available							2	3
Extension term (in months)							6 months	12 months
Allowable additional borrowing capacity			250,000,000
Revolving credit facility outstanding amount	$ 93,000,000				$ 100,000,000	$ 100,000,000