Long-Term Debt (Interest Rate Swaps) (Details) (USD $)	12 Months Ended		12 Months Ended
	Dec. 31, 2011 Interest Rate Swap [Member]	Oct. 31, 2010 Interest Rate Swap [Member]	Dec. 31, 2012 Swap [Member]	Dec. 31, 2011 Swap [Member]	Dec. 31, 2010 Swap [Member]	Dec. 31, 2011 September 2013 [Member] Interest Rate Swap [Member]	Dec. 31, 2011 October 2013 Thru September 2014 [Member] Interest Rate Swap [Member]	Dec. 31, 2011 October 2014 [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Interest Rate Swap [Member]	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 200,000,000	$ 348,300,000
Fixed Interest Rate of Swap	1.73%
Quarterly Amortization of Interest Rate Swap Notional Amount						2,500,000	5,000,000	7,500,000
Remaining Balance Of Interest Rate Swap Notional Amount	107,500,000
Realized Gain Loss On Derivatives	400,000
Derivative liability									6,486,000
Derivative Financial Instruments, Liabilities, Fair Value Disclosure										(5,078,000)
Unrealized (loss)/gain on interest rate swap, net of tax			(905,000)	(5,847,000)	2,990,000
Deferred Taxes Pertaining To Other Comprehensive Income Relating to Swaps			$ 600,000	$ 3,700,000