Income Taxes - Schedule Reconciles Difference between U.S. Federal Income Taxes at U.S. Statutory Rate and Our Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Expected expense at U.S. statutory rate of 35%									$ 40,083	$ 50,634	$ 49,591
Change resulting from:
State income tax expense, net of federal income tax benefit									3,662	2,088	3,225
Audits and adjustments, net									(1,730)	2,424	(665)
Change in valuation allowance									4,160	641	(1,643)
Foreign income taxed at different rates									(2,665)	(3,823)	(2,136)
Reorganization/recapitalization of foreign operations											(7,580)
Non-deductible compensation									275	485	512
Other, net									(282)	(544)	150
Income tax expense	$ 13,458	$ 9,135	$ 17,410	$ 3,500	$ 14,008	$ 9,349	$ 18,937	$ 9,611	$ 43,503	$ 51,905	$ 41,454
Effective tax rate									38.00%	35.90%	29.30%