Income Taxes (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits	$ 57,125	$ 47,146	$ 32,419
Deferred Tax Assets, Valuation Allowance	2,286	0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	33,400
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	2,300	1,300	700
Unrecognized tax benefits resulting in adjustment to deferred tax assets	23,700
Unrecognized Tax Benefits, Period Increase (Decrease)	10,000
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	9,979
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	0	(6,495)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	5,100	2,800
Valuation Allowances and Reserves, Balance	2,300
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(2,286)	5,390	$ 2,055
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	35,800	37,500
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	22,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	215,500	215,500
Deferred Tax Assets, Tax Credit Carryforwards	19,300	$ 19,300
California Franchise Tax Board [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 0
For the years ending December 31, 2014 to 2022 [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Limitations on Use	1.8
For the year ending December 31, 2023 [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Limitations on Use	1.3