Revolving Credit Facility and Long-Term Debt - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Feb. 23, 2017	Dec. 31, 2016	Jul. 06, 2016
Line of Credit Facility [Line Items]
2017 Debt facility	$ 6,998	$ 7,000	$ 0
Variable rate on 2017 debt facility	2.064%
Outstanding borrowings			(237,998)
Credit Agreement
Line of Credit Facility [Line Items]
Outstanding borrowings	$ (231,000)
Maximum facility capital expenditures in the next 12 months	30,000
Remaining borrowing capacity on line of credit	136,500
Debt subject to fixed interest rate	$ 128,800		$ 130,000
Variable Rate 1 | Credit Agreement
Line of Credit Facility [Line Items]
Variable interest rate percent	2.98222%
Debt subject to variable interest rate	$ 56,000
Variable Rate 2 | Credit Agreement
Line of Credit Facility [Line Items]
Variable interest rate percent			2.77%
Debt subject to variable interest rate			$ 150,000
Revolving Credit Facility | Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 275,000
Interest rate increase if in event of default	2.00%
Term Loan | Credit Agreement
Line of Credit Facility [Line Items]
Debt instrument, face amount				150,000
Bridge Loan | Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 25,000
Interest Rate Swap 1 | Credit Agreement
Line of Credit Facility [Line Items]
Fixed interest rate percent	3.115%		3.115%
Debt subject to fixed interest rate	$ 46,300		$ 45,000
Interest Rate Swap 2 | Credit Agreement
Line of Credit Facility [Line Items]
Fixed interest rate percent	2.9825%		2.9825%
Minimum | Revolving Credit Facility | Credit Agreement
Line of Credit Facility [Line Items]
Commitment fee percentage	0.15%
Maximum | Revolving Credit Facility | Credit Agreement
Line of Credit Facility [Line Items]
Commitment fee percentage	0.40%