Long-Term Debt (Loss on Extinguishment of Debt) (Details) (USD $)	3 Months Ended		9 Months Ended				3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012		Jun. 30, 2013 Term Loans		Mar. 31, 2013 Term Loans		Sep. 30, 2012 Term Loans		Mar. 31, 2012 Term Loans		Mar. 31, 2012 Senior Notes
Extinguishment of Debt [Line Items]
Face Amount Repaid/Retired			$ 2,400,000		$ 183,700,000		$ 1,200,000		$ 1,200,000		$ 108,200,000		$ 70,500,000		$ 5,000,000
Cash Paid			2,400,000		184,200,000		1,200,000		1,200,000		108,200,000		70,500,000		5,500,000
Loss	$ 0	$ 2,306,000	$ 36,000	[1]	$ 4,917,000	[1]	$ 0	[1]	$ 0	[1]	$ 2,300,000	[1]	$ 1,900,000	[1]	$ 700,000	[1]

[1] Including write-off of the discount and deferred financing costs related to the debt retired.