v3.3.1.900
Income Taxes - Net Operating Loss Carryforwards for Tax Purposes (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Operating Loss Carryforwards [Line Items]  
Amounts $ 252,081
Stock Adjustments 4,989
Total 257,070
Expiration Dates 2030 [Member]  
Operating Loss Carryforwards [Line Items]  
Amounts 4,083
Stock Adjustments 750
Total $ 4,833
Expiration Dates 2030
Expiration Dates 2031 [Member]  
Operating Loss Carryforwards [Line Items]  
Amounts $ 18,642
Stock Adjustments 1,012
Total $ 19,654
Expiration Dates 2031
Expiration Date 2032 [Member]  
Operating Loss Carryforwards [Line Items]  
Amounts $ 51,931
Stock Adjustments 2,724
Total $ 54,655
Expiration Dates 2032
Expiration Date 2033 [Member]  
Operating Loss Carryforwards [Line Items]  
Amounts $ 616
Stock Adjustments 503
Total $ 1,119
Expiration Dates 2033
Expiration Date 2034 [Member]  
Operating Loss Carryforwards [Line Items]  
Amounts $ 56,511
Total $ 56,511
Expiration Dates 2034
Expiration Date 2035 [Member]  
Operating Loss Carryforwards [Line Items]  
Amounts $ 120,298
Total $ 120,298
Expiration Dates 2035