Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Reconciliation [Line Items]
Foreign net operating loss carryforwards expiration period start year	2017
Foreign net operating loss carryforwards expiration period end year	2025
Valuation allowance	$ 5,209,000	$ 3,614,000
Impact of valuation allowances on Income tax provision	1,800,000
Net increase in valuation allowance from the prior year	1,600,000
Impact of valuation allowances on Other Comprehensive Income	200,000
Deferred tax liability not established by the company	130,600,000
Income taxes paid, net of refunds	12,300,000	7,700,000	$ 19,900,000
Recognized accrued interest and penalties lapsed	100,000	100,000	100,000
Payment of interest accrued	100,000	600,000	600,000
Accrued penalties payment	0	300,000	300,000
Unrecognized tax benefits that would impact effective tax rate	200,000	200,000	0
Decrease in unrecognized tax benefits within next fiscal year due to effective settlement	200,000
Reductions for tax positions of prior years	616,000	$ 0	$ 588,000
Reduction in unrecognized tax benefits resulting from resolution of audit	200,000
Tax benefit resulting from reduction of accrued interest	500,000
Tax benefit resulting from reduction of accrued penalties	100,000
Maximum [Member] | Foreign Country [Member]
Income Tax Reconciliation [Line Items]
Foreign net operating loss carryforwards	3,600,000
Minimum [Member] | Foreign Country [Member]
Income Tax Reconciliation [Line Items]
Foreign net operating loss carryforwards	$ 500,000