Commitments and Contingencies - Holten Settlement (Details) - Holten Settlement - USD ($)	1 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2010	Sep. 30, 2016
Loss Contingencies [Line Items]
Amount alleged to be payable to indirect controlling shareholder (more than)		$ 3,800,000.0
Amount payable to indirect controlling shareholder	$ 3,400,000
Amount to be recovered by the company through insurance	$ 1,900,000
Expense recognized related to litigation settlement			$ 1,500,000