Disposed and Discontinued Operations Part 2 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Disposed and Discontinued Operations [Abstract]
Revenue	$ 551,761	$ 508,767	$ 490,813
Gain (loss) on sale (including impairments), net of taxes	(4,743)	(14,203)	(11,170)
Earnings (loss) from operations before taxes	47,773	21,962	(4,853)
Benefit (provision) for income taxes	5,848	1,594	(962)
Gain (loss) from discontinued operations, net of tax	48,878	9,353	(16,985)
Assets of Discontinued Operations
Current assets	2,832	191,408
Non-current assets	1,609	435,685
Total assets of discontinued operations	4,441	627,093	673,550
Liabilities of Discontinued Operations
Current liabilities	31,592	91,933
Non-current liabilities	88,325	137,594
Total liabilities of discontinued operations	$ 119,917	$ 229,527