Leases (Quantitative Information About Leases) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Amortization of right-of-use assets		$ 5,092	$ 1,996	$ 9,917	$ 3,992
Interest on lease liabilities		4,574	162	9,002	1,539
Operating lease costs		1,376	2,135	2,964	4,602
Other short-term and variable lease costs		416	767	870	1,303
Sublease income	[1]		(16)	(16)	(32)
Total lease costs		11,458	5,044	22,737	11,404
Operating cash flows from finance leases		334	162	575	347
Operating cash flows from operating leases		1,168	2,207	2,547	4,415
Finance cash flows from finance leases		2,788	2,066	5,399	4,109
Right-of-use assets obtained in exchange for new finance lease liabilities		66		33,186
Right-of-use assets obtained in exchange for new operating lease liabilities		$ 1,238	$ 3,243	$ 2,586	$ 3,243
Weighted-average remaining lease term - finance leases		28 years 10 months 24 days	1 year 8 months 12 days	28 years 10 months 24 days	1 year 8 months 12 days
Weighted-average remaining lease term - operating leases		4 years 6 months	3 years 9 months 18 days	4 years 6 months	3 years 9 months 18 days
Weighted-average discount rate - finance leases		4.90%	4.50%	4.90%	4.50%
Weighted-average discount rate - operating leases		4.30%	4.60%	4.30%	4.60%

[1] Sublease income excludes rental income from owned properties.