Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 1,600,000	$ 500,000	$ 1,600,000	$ 500,000
Amount of unrecognized tax benefits that would, if recognized, reduce effective tax rate	0	0	0	0
Unrecognized tax benefits, income tax penalties and interest accrued	0	0	0	0
Unrecognized tax benefits, income tax penalties and interest expense	$ 0	$ 0	$ 0	$ 0
U.S. Federal Tax Authority
Income Tax Contingency [Line Items]
Open tax year			2011
California Tax Authority | Minimum
Income Tax Contingency [Line Items]
Open tax year			2010