Derivative Instruments - Schedule of Derivative Liability at Fair Value (Details) - Interest Rate Swap [Member] - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Jul. 22, 2016	Sep. 15, 2015
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 300,000,000
Interest rate swaps	6,848,000	$ 7,611,000
Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate swaps	6,848,000	7,611,000
2015 Term Loan [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount				$ 150,000,000
2015 Term Loan [Member] | Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate swaps	747,000	417,000
2016 Term Loan [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount			$ 150,000,000
2016 Term Loan [Member] | Prepaid expenses and other assets [Member]
Derivatives, Fair Value [Line Items]
Interest rate swaps	$ 6,101,000	$ 7,194,000