Derivative Financial Instrument (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013		Jun. 30, 2013
Derivative Financial Instrument [Abstract]
Variable rate debt	$ 260,833		$ 260,833
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion of Loss Recognized in AOCI on Derivatives	(151)		10
Effective portion of Loss Reclassified from AOCI into Earnings	0	[1]	0	[1]
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate purchased option fair value	55		55
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap fair value	69		69
Interest Rate Purchased Option [Member]
Derivative [Line Items]
Amount of hedged item	112,500		112,500
Floor interest rate (in hundredths)	1.25%		1.25%
Variable rate basis			30-day LIBOR
Notional amount	$ 112,500		$ 112,500
Fixed interest rate (in hundredths)	1.63%		1.63%

[1] No amounts related to the interest rate derivatives were reclassified from AOCI to interest expense during the period.