Income Tax Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current federal	$ (1,081)	$ 399	$ 1,174
Current state and local	743	894	1,748
Current foreign	(4,152)	(2,381)	6,493
Total current	(4,490)	(1,088)	9,415
Deferred federal, state and local	8,844	5,206	(8,883)
Deferred foreign	18,266	(1,189)	(5,781)
Total deferred	27,110	4,017	(14,664)
Provision (benefit) pertaining to corporate subsidiaries	$ 22,620	$ 2,929	$ (5,249)