Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Indefinitely reinvested foreign earnings	$ 131,000,000
Income tax provision, federal rate	35.00%	35.00%	35.00%
Unrecognized tax benefit	1,180,000	1,180,000	1,180,000	1,180,000
Unrecognized tax benefit, interest and penalties accrued	0	0	0
State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carry forwards, valuation allowance	11,200,000
State Jurisdiction
Income Taxes [Line Items]
Operating loss carry forwards, increase (decrease) in valuation allowance	0	400,000
Operating loss carry forwards	187,000,000
Operating loss carry forwards, tax effect	5,800,000
State Jurisdiction | Minimum
Income Taxes [Line Items]
Income tax, years under examination	2011
State Jurisdiction | Maximum
Income Taxes [Line Items]
Income tax, years under examination	2014
Local Jurisdiction
Income Taxes [Line Items]
Operating loss carry forwards	136,000,000
Operating loss carry forwards, tax effect	$ 5,400,000
Internal Revenue Service (IRS) | Minimum
Income Taxes [Line Items]
Income tax, years under examination	2012
Internal Revenue Service (IRS) | Maximum
Income Taxes [Line Items]
Income tax, years under examination	2014