Derivative Instruments and Hedging Activities (Details) (USD $)	12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Gains and (Losses) on Cash Flow Hedges [Member]	Dec. 31, 2013 Interest Expense [Member]	Dec. 31, 2012 Interest Expense [Member]	Dec. 31, 2013 Interest Rate Swap [Member]	Sep. 30, 2013 Interest Rate Swap [Member]	Aug. 31, 2010 Interest Rate Swap [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Designated as Hedging Instrument [Member] Interest Rate Swap [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member] Accrued liabilities and other [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Designated as Hedging Instrument [Member] Accrued liabilities and other [Member] Interest Rate Swap [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member] Deferred charges and other assets, net [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Designated as Hedging Instrument [Member] Deferred charges and other assets, net [Member] Interest Rate Swap [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Interest Rate Swap [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Accrued liabilities and other [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Accrued liabilities and other [Member] Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities [Abstract]
Notional amount of interest rate swaps not designated as cash flow hedges		$ 52,200,000
Notional amount of cash flow hedges	174,600,000	174,600,000
Derivatives, Fair Value [Line Items]
Derivative, expiry date	Jul. 31, 2013					Jul. 31, 2013
Amount of notional principal interest rate swap							174,600,000	63,300,000
Derivatives Liabilities, Fair Value											1,590,000	1,613,000					0	239,000
Derivative Assets, Fair Value													(5,926,000)	(177,000)
Derivative Assets (Liabilities), at Fair Value, Net									(4,336,000)	1,436,000					0	239,000
Derivative Instruments, Gain (Loss) [Line Items]
Changes in fair value recorded in interest expense				239,000	213,000
Amount reclassified as an increase to interest expense during next twelve months				1,600,000
Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), before Tax			(1,436,000)
Other Comprehensive Income Loss Before Reclassifications Before Tax			4,111,000
Amounts reclassified from accumulated other comprehensive income (to interest expense), before tax			1,661,000
Net current period other comprehensive income before tax			5,772,000
Accumulated Other Comprehensive Income (Loss), before Tax			4,336,000
Accumulated Other Comprehensive Income (Loss), Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Tax			573,000
Other comprehensive income before reclassifications, tax			(1,647,000)
Amounts reclassified From accumulated other comprehensive income tax (to interest expense)			(668,000)
Net current period other comprehensive income, tax			(2,315,000)
Accumulated Other Comprehensive Income (Loss), Tax			(1,742,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	(863,000)		(863,000)
Other comprehensive income before reclassifications, net of tax			2,464,000
Amounts reclassified from accumulated other comprehensive income (to interest expense), net of tax			993,000
Net current period other comprehensive income, net of tax			3,457,000
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	$ 2,594,000		$ 2,594,000