Derivative Financial Instruments (Details 3) (Derivatives designated as cash flow hedging instruments, USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Derivatives designated as cash flow hedging instruments
Gain (loss), net of tax recognized in accumulated other comprehensive income (loss)	$ 0		$ 1,054		$ 1,303		$ 3,532
Gain, net of tax, reclassified from accumulated other comprehensive income (loss) to earnings	0	[1]	(636)	[1]	(677)	[1]	(1,866)	[1]
Loss, net of tax, reclassified from accumulated other comprehensive income (loss) to earnings (ineffective portion)	0	[2]	235	[2]	1,053	[2]	235	[2]
Interest rate cap
Derivatives designated as cash flow hedging instruments
Gain (loss), net of tax recognized in accumulated other comprehensive income (loss)	0		(3)		0		(6)
Gain, net of tax, reclassified from accumulated other comprehensive income (loss) to earnings	0	[1]	0	[1]	0	[1]	0	[1]
Loss, net of tax, reclassified from accumulated other comprehensive income (loss) to earnings (ineffective portion)	0	[2]	0	[2]	0	[2]	0	[2]
Interest rate swaps
Derivatives designated as cash flow hedging instruments
Gain (loss), net of tax recognized in accumulated other comprehensive income (loss)	0		1,057		1,303		3,538
Gain, net of tax, reclassified from accumulated other comprehensive income (loss) to earnings	0	[1]	(636)	[1]	(677)	[1]	(1,866)	[1]
Loss, net of tax, reclassified from accumulated other comprehensive income (loss) to earnings (ineffective portion)	$ 0	[2]	$ 235	[2]	$ 1,053	[2]	$ 235	[2]

[1] The effective portion of the interest rate swap amounts are reported within interest expense, net in the Condensed Consolidated Statements of Operations.

[2] The ineffective portion of the interest rate swap is reported within other income (loss) in the Condensed Consolidated Statements of Operations.