Discontinued Operations (Components Of Income (Loss) From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended						12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Discontinued Operations [Abstract]
Revenues							$ 16,231	$ 105,834	$ 118,573
Income (loss) from discontinued operations before income tax							(8,249)	(32,051)	(7,558)
Income tax expense (benefit)							(1,771)	(9,083)	(2,505)
Gain (loss) on disposition, net of tax							(10,729)	6,133	724
Income (loss) from discontinued operations, net of tax	(970)	(16,237)	(33,976)	4,781	6,734	5,626	(17,207)	(16,835)	(4,329)
Gain (loss) on disposition, tax							$ (2,391)	$ 2,425	$ 359