Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Accounting Policies [Line Items]
Percentage Change in Ownership due to Acquisition	100.00%		100.00%
Deferred Finance Costs [Abstract]
Deferred Finance Costs, Noncurrent, Gross	$ 19,706		$ 19,706		$ 15,297
Accumulated Amortization, Deferred Finance Costs	2,981		2,981		1,881
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	4,733	3,700	4,600	3,200
Charged to expense	1,126	1,015	2,227	2,630
Warranty payments	(1,099)	(673)	(2,067)	(1,788)
Balance at end of period	4,760	4,042	4,760	4,042
Senior Notes | Senior Secured Notes due 2017 | Level 2 Inputs
Fair Value Disclosures [Abstract]
Senior Secured Notes Fair Value	$ 368,100		$ 368,100		$ 269,100