Derivative Financial Instruments - Effect of Cash Flow Hedging on AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Loss recognized in AOCI on derivative	$ 74	$ 2,341	$ 15,459	$ 7,642
(Gain) loss reclassified from AOCI into income	(1,101)	(60)	(2,367)	(74)
Interest rate swaps
Derivative [Line Items]
Loss recognized in AOCI on derivative	74	2,341	11,192	7,642
Settled treasury hedges
Derivative [Line Items]
Loss recognized in AOCI on derivative	0	0	4,267	0
Settled interest rate swaps
Derivative [Line Items]
Loss recognized in AOCI on derivative	0	0	0	0
Total interest expense
Derivative [Line Items]
(Gain) loss reclassified from AOCI into income	1,101	60	2,367	74
Total interest expense | Interest rate swaps
Derivative [Line Items]
(Gain) loss reclassified from AOCI into income	952	18	2,012	(52)
Total interest expense | Settled treasury hedges
Derivative [Line Items]
(Gain) loss reclassified from AOCI into income	107	0	229	0
Total interest expense | Settled interest rate swaps
Derivative [Line Items]
(Gain) loss reclassified from AOCI into income	$ 42	$ 42	$ 126	$ 126