CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense	$ 67	$ 992	$ 994
Corporate Segment [Member]
Allocated Share-based Compensation Expense	$ 104	$ 4,154	$ 4,805