Goodwill and Other Intangibles - Goodwill Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Balance - beginning of period	$ 1,037,412	$ 901,529	$ 910,818
Foreign currency translation adjustments	2,614	(7,129)	(9,289)
Acquisition of CPA:18 – Global (Note 4)		172,346
Impairment charges (Note 10)	0	(29,334)	0
Allocation of goodwill distributed to NLOP (Note 3)	(61,737)
Balance - end of period	978,289	1,037,412	901,529
Real Estate
Goodwill
Balance - beginning of period	1,037,412	872,195	881,484
Foreign currency translation adjustments	2,614	(7,129)	(9,289)
Acquisition of CPA:18 – Global (Note 4)		172,346
Impairment charges (Note 10)		0
Allocation of goodwill distributed to NLOP (Note 3)	(61,737)
Balance - end of period	978,289	1,037,412	872,195
Investment Management
Goodwill
Balance - beginning of period	0	29,334	29,334
Foreign currency translation adjustments	0	0	0
Acquisition of CPA:18 – Global (Note 4)		0
Impairment charges (Note 10)		(29,334)
Allocation of goodwill distributed to NLOP (Note 3)	0
Balance - end of period	$ 0	$ 0	$ 29,334