Schedule of VIEs (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Assets	$ 24,692,208	$ 22,584,555
Liabilities	13,873,078	12,124,820
NHP/PMB L.P. | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure
Variable Interest Entity [Line Items]
Assets	666,404	673,467
Liabilities	244,934	238,147
Other Identified VIEs | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure
Variable Interest Entity [Line Items]
Assets	4,075,821	2,076,715
Liabilities	1,459,830	405,350
Tax Credit VIEs | Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure
Variable Interest Entity [Line Items]
Assets	845,229	797,077
Liabilities	$ 333,809	$ 297,004