Debt (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Line of Credit Facility [Line Items]
Unamortized debt issuance expense	$ 1,700,000	$ 1,800,000
Commitment fee		0.20%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 350,000,000
Commitment fee	0.20%
Required interest coverage ratio	3.00
Revolving Credit Facility | Pre-EBITDA Metric
Line of Credit Facility [Line Items]
Leverage ratio EBITDA metric	$ 135,000,000
Allowed leverage ratio	4.00
Allowed leverage ratio post-acquisition	4.50
Revolving Credit Facility | Post-EBITDA Metric
Line of Credit Facility [Line Items]
Leverage ratio EBITDA metric	$ 135,000,000
Allowed leverage ratio	5.00
Allowed leverage ratio post-acquisition	5.50
Revolving Credit Facility | Federal Funds Effective Swap Rate
Line of Credit Facility [Line Items]
Basis spread	0.50%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread	1.00%
Revolving Credit Facility | Overnight Bank Funding Rate
Line of Credit Facility [Line Items]
Basis spread	0.50%