Derivative Instruments - Derivative Narrative (Details) (USD $)	12 Months Ended				9 Months Ended	12 Months Ended								3 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 10, 2012 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Oct. 10, 2012 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Dec. 31, 2012 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] July 2011 Maturity [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] Q1 2011 Maturity [Member]	Dec. 31, 2013 Senior Secured Term Loan A [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member]	Dec. 31, 2013 Senior Secured Term Loan B [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member]	Oct. 15, 2013 Senior Secured Term Loan B [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member]	Dec. 31, 2013 Senior Secured Term Loan B [Member] Interest Rate Swap [Member] Cash Flow Hedging [Member] Interest Expense [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member] Interest Expense [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer																	12 months
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred																	$ (400,000)
Derivative, Fixed Interest Rate				1.80%									0.74%		2.05%
Derivative, Cash Received on Hedge														3,300,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net								2,510,000	(250,000)	(360,000)						2,000,000
Derivative, Notional Amount				100,000,000							125,000,000	75,000,000	175,000,000		150,000,000
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion					(1,000,000)	1,060,000	(760,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	1,700,000	1,000,000	100,000		(600,000)											1,300,000
Derivatives, Loss on Derivatives, Net of Tax																		600,000
Derivative, Loss on Derivatives, Amount of Tax																		$ 400,000