Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Payments for income taxes net of refunds	$ 63,390	$ 76,782	$ 97,093
Tax loss carry forward state	13,405
Tax loss carry forward foreign	45,098
Deferred tax assets tax credit carry forwards state and local	613
Capital losses	52,505
Unrecognized tax benefits, exclusive of interest	8,314	5,878	5,138	987
Recognition of unrecognized tax benefit upon which the effective rate would change	8,314
Accrued tax provision of interest expense	261	138	27
Unrecognized tax benefits interest on income taxes accrued	425
Deferred tax liability on undistributed earnings	$ 516,292