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Income Taxes - Schedule of Current and Deferred Income Tax (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
U.S. federal tax (benefit)	$ 19,918	$ 5,312	$ (11,471)
State and local tax (benefit)	2,765	19	6,390
Non- U.S. operations	(61)	113	685
Current income taxes	22,622	5,444	(4,396)
Deferred:
U.S. federal tax (benefit)	(17,303)	143	27,799
State and local tax (benefit)	(4,890)	(1,029)	3,356
Non U.S. operations (benefit)	(105)	673	452
Deferred income taxes	(26,642)	(745)	31,606
Income tax provision	$ 324	$ 5,231	$ 27,211

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