Condensed Consolidating Financial Information (Details 3) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
STATEMENT OF CASH FLOWS
Net cash provided by (used in) operating activities	$ 26,508,000	$ 44,669,000
Net cash provided by (used in) investing activities	(30,937,000)	(49,530,000)
Net cash provided by (used in) financing activities	(4,212,000)	23,789,000
Net increase (decrease) in cash	(8,641,000)	18,928,000
Guarantor Parent Company
STATEMENT OF CASH FLOWS
Net cash provided by (used in) operating activities	2,058,000	(32,710,000)
Net increase (decrease) in cash	2,058,000	(32,710,000)
Issuer Subsidiary
STATEMENT OF CASH FLOWS
Net cash provided by (used in) operating activities	321,000	(76,163,000)
Net cash provided by (used in) financing activities	(321,000)	24,725,000
Net increase (decrease) in cash		(51,438,000)
Guarantor Subsidiaries
STATEMENT OF CASH FLOWS
Net cash provided by (used in) operating activities	28,197,000	83,631,000
Net cash provided by (used in) investing activities	(30,528,000)	(40,256,000)
Net cash provided by (used in) financing activities	(122,000)
Net increase (decrease) in cash	(2,453,000)	43,375,000
Non-Guarantor Subsidiaries
STATEMENT OF CASH FLOWS
Net cash provided by (used in) operating activities	(4,068,000)	(8,655,000)
Net cash provided by (used in) investing activities	(409,000)	(9,274,000)
Net cash provided by (used in) financing activities	(3,769,000)	(936,000)
Net increase (decrease) in cash	(8,246,000)	(18,865,000)
Eliminations
STATEMENT OF CASH FLOWS
Net cash provided by (used in) operating activities		78,566,000
Net increase (decrease) in cash		$ 78,566,000