Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Income Taxes [Line Items]
State and foreign net operating loss carry forwards	$ 31,824,000	[1]	$ 30,621,000	[2]
State tax credits	3,007,000	[1]	8,307,000	[2]
Valuation allowance	8,733,000	[1]	7,570,000	[2]
Increase in valuation allowance	1,200,000
Unrecognized tax benefits that would impact effective tax rate	21,300,000
Unrecognized tax benefit that would be offset by tax benefits associated with transfer pricing adjustment	11,700,000
Unrecognized tax benefit with uncertainty about timing of deductibility	7,500,000
Accrued interest	2,000,000		2,600,000
Tax years subject to examination	2012
Minimum
Income Taxes [Line Items]
Decrease in liability for uncertain tax positions	15,000,000
Period of income tax returns examination after filing	3 years
Maximum
Income Taxes [Line Items]
Decrease in liability for uncertain tax positions	$ 23,000,000
Period of income tax returns examination after filing	5 years

[1] Includes $7.5 million of deferred tax assets related to uncertain tax positions.

[2] Includes $11.7 million of deferred tax assets related to uncertain tax positions.