Description of Business and Basis of Presentation (Schedule of Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	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
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Revenues, Net									$ 0	$ 0	$ 79,768
Income (Loss) Before Income Taxes									498	822	(63,311)
Income Tax (Expense) Benefit									(184)	(730)	25,221
Income (Loss) From Discontinued Operations, Net of Income Taxes	$ 0	$ 105	$ 105	$ 104	$ 213	$ (314)	$ 97	$ 96	$ 314	$ 92	$ (38,090)