Reportable Segment Information (Details 2) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Reconciliation of reportable segment operating income to consolidated income before income taxes
Operating income	$ 21,376	$ 21,747	$ 64,593	$ 69,781
Interest expense	(26,297)	(24,617)	(79,161)	(74,176)
Earnings from equity investments	8,895	13,031	27,469	42,474
(Loss) on early extinguishment of debt	(4,185)	(2,236)	(4,185)	(2,236)
Other expense (income), net	(1,711)	3,011	159	(9,555)
Income (loss) before income taxes	(1,922)	10,936	8,875	26,288
Total Operating Segments
Reconciliation of reportable segment operating income to consolidated income before income taxes
Operating income	45,277	36,150	131,881	117,776
Unallocated corporate costs
Reconciliation of reportable segment operating income to consolidated income before income taxes
Unallocated corporate costs	$ (23,901)	$ (14,403)	$ (67,288)	$ (47,995)