Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation Allowance [Line Items]
Federal statutory rate	35.00%
Decrease in current state income tax expense	$ 100,000
Federal net operating losses to be utilized	308,600,000
Estimated net operating losses to be utilized in preparing the 2012 Federal income tax return	44,300,000
Limited net operating losses under Section 382	6,100,000
Net operating loss carry-forward under Section 382	264,300,000
Deferred tax asset valuation allowance	114,190,000	119,277,000
Reduction of deferred income tax assets	17.50%	19.50%
Increase (decrease) in valuation allowance	5,100,000
Federal income tax at statutory rate	35.00%	35.00%	35.00%
Uncertain income tax positions	0	0
Unrecognized tax benefits	0	0
Foreign operations [Member]
Valuation Allowance [Line Items]
Foreign NOLs available for future years	700,000
Foreign tax credits	$ 500,000
Minimum [Member] | State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Unrecognized Tax Benefits, Applicable Statute of Limitations	3 years
Maximum [Member] | State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Unrecognized Tax Benefits, Applicable Statute of Limitations	4 years