Derivative Instruments, Hedging Activities and Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, average cap interest rate (as percent)	3.92%		3.92%
Hedge derivative at fair value, net	$ 20,700		$ 20,700		$ 3,500
Gain (loss) reclassified to earnings	36		800
Gain (loss) reclassified from accumulated OCI into income, effective portion, net		$ 300		$ 400
Interest expense	14,302	$ 16,058	46,884	$ 49,141
Decrease As Hedged Forecasted Interest Payments Occur
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest expense			1,400
Prepaid and Other Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedge asset at fair value					3,600
Accounts Payable and Accrued Expenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedge liability at fair value					7,100
Accrued Interest
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedge derivative at fair value, net	20		20		$ 100
Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount	$ 266,200		$ 266,200