Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes And Tax Related [Line Items]
Unrecognized tax benefits	$ 11,450,000	$ 12,144,000	$ 14,002,000	$ 14,781,000
Uncertain tax position for transfer pricing exposure reflected within other long-term liabilities	600,000
Uncertain tax position for transfer pricing exposure reflected within other long-term assets	200,000
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities	200,000
Total liabilities for tax obligation and associated interest and penalties	33,800,000	33,200,000
Income tax provisions for uncertain tax benefits	11,700,000	12,400,000
Interest accruals	19,900,000	18,600,000
Penalty accruals	2,200,000	2,200,000
Tax provision due to indemnification	2,500,000	1,200,000	1,900,000
Total noncurrent assets related to indemnification	$ 17,600,000	17,800,000
Period for which domestic pre-tax losses were generated	2 years
Period over which cumulative loss was incurred	3 years
Valuation allowance, deferred tax assets	$ 154,252,000	$ 152,138,000	$ 151,339,000	$ 125,782,000
Income tax returns subject to examination period	3 years
Federal Research Credit [Member]
Income Taxes And Tax Related [Line Items]
Tax credits	$ 2,400,000
Foreign Tax Credits [Member]
Income Taxes And Tax Related [Line Items]
Tax credits	4,400,000
State Research Credit [Member]
Income Taxes And Tax Related [Line Items]
Tax credits	1,800,000
Federal [Member]
Income Taxes And Tax Related [Line Items]
Net operating loss carryovers	175,500,000
Massachusetts [Member] | Investment Tax Credits [Member]
Income Taxes And Tax Related [Line Items]
Tax credits	$ 300,000
Puerto Rico [Member]
Income Taxes And Tax Related [Line Items]
Tax rate during tax holiday period (as a percent)	4.00%	4.00%	4.00%
BMS [Member]
Income Taxes And Tax Related [Line Items]
Tax provision due to indemnification	$ 2,100,000	$ 1,900,000
Payments made on behalf of the company to a number of states in connection with state income tax settlements	1,900,000	6,300,000	$ 0
Decrease in amount due from BMS included within other long-term assets	1,600,000	2,900,000
Reduction in tax receivable included in other expense	$ 400,000	$ 1,100,000
Minimum [Member] | State and Local Jurisdiction [Member]
Income Taxes And Tax Related [Line Items]
Income tax returns subject to examination period	3 years
Minimum [Member] | State Research Credit [Member]
Income Taxes And Tax Related [Line Items]
Tax credit carryforward, expiration year	2024
Minimum [Member] | Federal [Member]
Income Taxes And Tax Related [Line Items]
Operating loss carryovers, expiration year	2031
Maximum [Member] | State and Local Jurisdiction [Member]
Income Taxes And Tax Related [Line Items]
Income tax returns subject to examination period	4 years
Maximum [Member] | State Research Credit [Member]
Income Taxes And Tax Related [Line Items]
Tax credit carryforward, expiration year	2029
Maximum [Member] | Federal [Member]
Income Taxes And Tax Related [Line Items]
Operating loss carryovers, expiration year	2034