Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Jul. 31, 2020
Assets:
Cash and cash equivalents	$ 149,725	$ 413,327
Non-mortgage loans receivable, net	19,024	57,077
Debt Securities, Available-for-sale	0	237,553
Liabilities:
Long-term debt, gross	12,093,138	11,983,071
Redeemable OP Unitholder interests, Fair Value	182,100	146,000
Brookdale Senior Living
Assets:
Cash and cash equivalents			$ 162,000
Stock warrants			28,000
Non-mortgage loans receivable, net			45,000
Secured/mortgage loans and other, net
Assets:
Debt Securities, Held-to-maturity	488,913	555,840
Debt Securities, Held-to-maturity, Fair Value	478,931	508,707
Secured/mortgage loans and other, net | Brookdale Senior Living
Assets:
Debt Securities, Held-to-maturity			$ 78,000
Government-Sponsored Pooled Loan Investments
Assets:
Debt Securities, Available-for-sale	41,213	49,727
Non-mortgage loans receivable, net (2)
Assets:
Non-mortgage loans receivable, net	19,024	57,077
Non-mortgage loans receivable, fair value	19,039	57,009
Fair Value
Assets:
Cash and Cash Equivalents, Fair Value Disclosure	149,725	413,327
Escrow deposits and restricted cash	46,872	38,313
Derivative Asset	1,128	2
Liabilities:
Long-term Debt, Fair Value	12,891,937	13,075,337
Derivative Liability	12,290	28,338
Redeemable OP Unitholder interests, Fair Value	182,112	145,983
Fair Value | Brookdale Senior Living
Assets:
Stock warrants	48,884	50,098
Fair Value | Secured/mortgage loans and other, net
Assets:
Debt Securities, Held-to-maturity, Fair Value	478,931	508,707
Fair Value | Debt Securities
Assets:
Debt Securities, Available-for-sale	0	237,553
Fair Value | Government-Sponsored Pooled Loan Investments
Assets:
Debt Securities, Available-for-sale	41,213	49,727
Fair Value | Non-mortgage loans receivable, net (2)
Assets:
Non-mortgage loans receivable, fair value	19,039	57,009
Carrying Amount
Assets:
Cash and cash equivalents	149,725	413,327
Escrow deposits and restricted cash	46,872	38,313
Derivative Asset	1,128	2
Liabilities:
Long-term debt, gross	12,093,138	11,983,071
Derivative Liability	12,290	28,338
Redeemable Noncontrolling Interest, Equity, Carrying Amount	182,112	145,983
Carrying Amount | Brookdale Senior Living
Assets:
Stock warrants	48,884	50,098
Carrying Amount | Secured/mortgage loans and other, net
Assets:
Debt Securities, Held-to-maturity	488,913	555,840
Carrying Amount | Debt Securities
Assets:
Debt Securities, Available-for-sale	0	237,553
Carrying Amount | Government-Sponsored Pooled Loan Investments
Assets:
Debt Securities, Available-for-sale	41,213	49,727
Carrying Amount | Non-mortgage loans receivable, net (2)
Assets:
Non-mortgage loans receivable, net	$ 19,024	$ 57,077