Discontinued Operations (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
Discontinued Operations and Disposal Groups [Abstract]
Revenue	$ 0	$ 164,162	$ 0	$ 313,383
Gain on sale, net of taxes	1,860	0	1,860	0
Earnings (loss) from operations before taxes	(326)	13,766	(1,112)	26,304
Benefit (provision) for income taxes	(335)	(3,195)	(313)	4,381
(Loss) earnings from discontinued operations, net of tax	1,199	10,571	435	30,685
Assets of Discontinued Operations
Current assets	2,731		2,731		2,832
Non-current assets	297		297		1,609
Total assets of discontinued operations	3,028		3,028		4,441
Liabilities of Discontinued Operations
Current liabilities	8,467		8,467		31,592
Non-current liabilities	88,087		88,087		88,325
Total liabilities of discontinued operations	$ 96,554		$ 96,554		$ 119,917