Property and Equipment - Property and Equipment Net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 21,983	$ 23,758
Less accumulated depreciation	(19,400)	(20,426)
Property and equipment, net	2,583	3,332
Leasehold Improvements
Property Plant And Equipment [Line Items]
Depreciable life	Shorter of estimated useful life or life of lease
Property and equipment, gross	2,559	2,388
Office furniture, fixtures, and equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	17,749	19,274
Office furniture, fixtures, and equipment | Minimum
Property Plant And Equipment [Line Items]
Depreciable life	3 years
Office furniture, fixtures, and equipment | Maximum
Property Plant And Equipment [Line Items]
Depreciable life	10 years
Equipment Under Capital Leases
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,675	$ 2,096
Equipment Under Capital Leases | Minimum
Property Plant And Equipment [Line Items]
Depreciable life	3 years
Equipment Under Capital Leases | Maximum
Property Plant And Equipment [Line Items]
Depreciable life	5 years