Commitments and Contingencies - Contingencies (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Additions to goodwill through acquisitions		$ 3,998,000
Loss Contingency Accrual, Payments		1,700,000
Conditional Agreement
Loss Contingencies [Line Items]
Loss Contingency Accrual		2,700,000
Employee Benefits
Loss Contingencies [Line Items]
Loss Contingency Accrual, Payments		1,500,000
Loss contingency accrual, provision (reversal)		(500,000)
Employment Contracts
Loss Contingencies [Line Items]
Loss contingency accrual, provision (reversal)		(1,500,000)
Other Matters
Loss Contingencies [Line Items]
Loss contingency accrual, provision (reversal)		(300,000)
Brinderson LP | Pre-Acquisition Related Contingencies
Loss Contingencies [Line Items]
Loss Contingency Accrual		$ 10,500,000
Loss Contingency, Range of Possible Loss, Minimum			$ 0
Loss Contingency, Range of Possible Loss, Maximum			$ 24,000,000
Additions to goodwill through acquisitions	$ 14,500,000