Income Taxes - Income tax expense (benefit) from continuing operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
Federal	$ 13,093	$ 6,509	$ 5,712
Foreign	297	612	(1,519)
State and local	2,937	1,906	983
Current Income Tax Expense (Benefit)	16,327	9,027	5,176
Deferred
Federal	2,124	2,057	(12,933)
Foreign	(1,168)	(371)	(544)
State and local	96	(1,531)	115
Deferred Income Tax Expense (Benefit)	$ 1,052	$ 155	$ (13,362)