Income Taxes - Summary of Tax Credit Carryforwards (Details) $ in Thousands	Dec. 31, 2016 USD ($)
State
Operating Loss Carryforwards [Line Items]
Net operating losses, Gross Amount	$ 81,861
Net operating losses, Tax Effected	3,102
Net operating losses, Valuation Allowance	3,102
Federal
Operating Loss Carryforwards [Line Items]
Net operating losses, Gross Amount	25,573
Net operating losses, Tax Effected	8,951
Net operating losses, Valuation Allowance	0
State tax credit carryforwards
Operating Loss Carryforwards [Line Items]
State tax credit carryforwards, Gross Amount	17,967
State tax credit carryforwards, Tax Effected	17,967
State tax credit carryforwards, Valuation Allowance	$ 17,719