Stockholders' Equity - AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	$ 1,491,315	$ 1,958,678
Total other comprehensive income (loss)	676	(8,733)
Ending balance	1,495,920	1,835,699
Accumulated Other Comprehensive Income
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	8,786	54,588
Other comprehensive income (loss) before reclassification		(8,502)
Amounts reclassified from AOCI		760
Total other comprehensive income (loss)	660	(7,742)
Ending balance	9,446	46,846
Unrealized gain (loss) on real estate securities, available for sale
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance		275
Other comprehensive income (loss) before reclassification		(1,035)
Amounts reclassified from AOCI		760
Total other comprehensive income (loss)		(275)
Ending balance		0
Unrealized gain on net investment hedges
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	17,893	47,127
Other comprehensive income (loss) before reclassification		0
Amounts reclassified from AOCI		0
Total other comprehensive income (loss)	0	0
Ending balance	17,893	47,127
Foreign currency translation gain (loss)
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	(9,107)	7,186
Other comprehensive income (loss) before reclassification		(7,467)
Amounts reclassified from AOCI		0
Total other comprehensive income (loss)	660	(7,467)
Ending balance	(8,447)	(281)
AOCI Attributable to Noncontrolling Interest | OP
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	(162)	1,058
Other comprehensive income (loss) before reclassification		(190)
Amounts reclassified from AOCI		(25)
Total other comprehensive income (loss)	16	(215)
Ending balance	(146)	843
AOCI Attributable to Noncontrolling Interest | Investment Entities
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	1,872	2,193
Other comprehensive income (loss) before reclassification	0
Amounts reclassified from AOCI	(1,872)
Total other comprehensive income (loss)	(1,872)	(776)
Ending balance	0	1,417
Unrealized gain (loss) on real estate securities, available for sale | OP
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance		(73)
Other comprehensive income (loss) before reclassification		98
Amounts reclassified from AOCI		(25)
Total other comprehensive income (loss)		73
Ending balance		0
Unrealized gain on net investment hedges | OP
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	710	1,403
Other comprehensive income (loss) before reclassification		0
Amounts reclassified from AOCI		0
Total other comprehensive income (loss)	0	0
Ending balance	710	1,403
Foreign currency translation gain (loss) | OP
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	(872)	(272)
Other comprehensive income (loss) before reclassification		(288)
Amounts reclassified from AOCI		0
Total other comprehensive income (loss)	16	(288)
Ending balance	(856)	(560)
Foreign currency translation gain (loss) | Investment Entities
AOCI Attributable to Noncontrolling Interest, Net of Tax [Abstract]
Beginning balance	1,872	2,193
Other comprehensive income (loss) before reclassification	0
Amounts reclassified from AOCI	(1,872)
Total other comprehensive income (loss)	(1,872)	(776)
Ending balance	$ 0	$ 1,417