Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Provision for income taxes	$ 45,388,000	$ 51,754,000	$ 38,076,000
Effective tax rate	37.60%	39.70%
Provision for federal income taxes rate	33.00%	32.70%
Net benefit for state taxes rate	2.00%	2.30%
Provision for state taxes rate	5.80%	6.60%
Net provision for permanent book versus tax differences rate	(2.20%)	(0.40%)
Federal income tax rate	35.00%	35.00%
Undistributed earnings	5,600,000
Net earnings distributed	2,200,000
Income tax holiday, description	The Company's subsidiary in Costa Rica is operating under a 100% tax holiday through December 31, 2018 and a 50% tax holiday for the subsequent four years. The impact of the tax holiday in Costa Rica for the year ended December 31, 2013 was immaterial.
Unrecognized tax benefit	71,273,000	1,784,000
Net tax benefit from unrecognized tax benefits, if recognized	13,500,000
Increase in gross unrecognized tax benefit	79,400,000
Prior years' uncertain tax positions, interest	1,400,000
Accrued potential interest	11,700,000
Net operating loss carry forward	30,400,000
AACC Merger [Member]
Income Taxes [Line Items]
Unrecognized tax benefit	$ 83,000,000
Costa Rica [Member] | Tax Holiday Through December 31, 2018 [Member]
Income Taxes [Line Items]
Holiday tax rate	100.00%
Costa Rica [Member] | Subsequent Four Years [Member]
Income Taxes [Line Items]
Holiday tax rate	50.00%