Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of State NOL Carryforwards Expiration Year (Detail)

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Income Taxes - Summary of State NOL Carryforwards Expiration Year (Detail) - State
$ in Thousands
Dec. 31, 2016
USD ($)
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 83,027
2017  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 6,930
2018  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 1,132
2019  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 7,646
2020  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 2,121
2021  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 4,050
Thereafter  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 61,148