Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Finance Lease, Liability, Maturity [Table Text Block]

The following tables details the future minimum lease payments under the Company's current leases and a reconciliation of undiscounted and discounted cash flows for operating and finance leases (dollars in thousands):

	Payments due by period
	2020		2021		2022		2023		2024		Thereafter
Operating Lease Obligations	$	12,050	$	14,055	$	14,003	$	13,473	$	13,320	$	364,284
Finance Lease Obligations	1,077		1,080		1,082		1,084		1,087		40,133
	$	13,127	$	15,135	$	15,085	$	14,557	$	14,407	$	404,417

	Total undiscounted cash flows		Total lease liabilities		Difference between discounted and undiscounted cash flows
Operating Lease Obligations	$	431,185	$	120,261	$	310,924
Finance Lease Obligations	45,543		20,207		25,336
	$	476,728	$	140,468	$	336,260

Lease, Weighted-Average Remaining Lease Term and Discount Rate [Table Text Block]

The following table details the weighted average remaining lease term and discount rates for the Company’s ground and office leases:

Weighted-average remaining lease term - finance leases	26 years
Weighted-average remaining lease term - operating leases	53 years
Weighted-average discount rate - finance leases	4.63	%
Weighted-average discount rate - operating leases	5.06	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

The following tables details the future minimum lease payments under the Company's current leases and a reconciliation of undiscounted and discounted cash flows for operating and finance leases (dollars in thousands):

	Payments due by period
	2020		2021		2022		2023		2024		Thereafter
Operating Lease Obligations	$	12,050	$	14,055	$	14,003	$	13,473	$	13,320	$	364,284
Finance Lease Obligations	1,077		1,080		1,082		1,084		1,087		40,133
	$	13,127	$	15,135	$	15,085	$	14,557	$	14,407	$	404,417

	Total undiscounted cash flows		Total lease liabilities		Difference between discounted and undiscounted cash flows
Operating Lease Obligations	$	431,185	$	120,261	$	310,924
Finance Lease Obligations	45,543		20,207		25,336
	$	476,728	$	140,468	$	336,260

Future Minimum Lease Payments Under Current Leases

	Payments due by period
	2020		2021		2022		2023		2024		Thereafter
Operating Lease Obligations	$	12,050	$	14,055	$	14,003	$	13,473	$	13,320	$	364,284
Finance Lease Obligations	1,077		1,080		1,082		1,084		1,087		40,133
	$	13,127	$	15,135	$	15,085	$	14,557	$	14,407	$	404,417

	Total undiscounted cash flows		Total lease liabilities		Difference between discounted and undiscounted cash flows
Operating Lease Obligations	$	431,185	$	120,261	$	310,924
Finance Lease Obligations	45,543		20,207		25,336
	$	476,728	$	140,468	$	336,260