Income Taxes Income Taxes - Provision for (Benefit from) Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Federal
Current	$ 0	$ 65	$ 0
Deferred	22,382	21,026	23,193
Total federal income tax expense	22,382	21,091	23,193
State
Current	438	224	386
Deferred	1,486	1,394	2,914
Total state tax expense	1,924	1,618	3,300
Foreign
Current	1,173	1,263	1,197
Deferred	126	(747)	60
Total foreign tax expense	1,299	516	1,257
Provision for income taxes	$ 25,605	$ 23,225	$ 27,750