Debt Commitments and Contingencies - Note Payable Under Acquisition Agreement (Details) - USD ($) $ in Thousands	1 Months Ended
	Dec. 31, 2015	Sep. 30, 2016	Dec. 07, 2015
Debt Instrument [Line Items]
Debt	$ 365,000	$ 445,000
Note Payable Under Acquisition Agreement [Member]
Debt Instrument [Line Items]
Debt	15,000	$ 15,000
Fixed interest rate per annum		0.56%
Apex Industrial Technologies, LLC [Member]
Debt Instrument [Line Items]
Consideration for assets and transition arrangement			$ 27,000
Cash paid for assets and transition arrangement	$ 12,000