Other assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other Assets Disclosure [Abstract]
Net deferred tax assets (net of valuation allowance)	$ 907,689	$ 953,676
Investments in equity method investees	210,923	210,001
Prepaid taxes	34,585	39,405
Other prepaid expenses	32,131	33,384
Capitalized computer software costs	80,097	81,862
Derivative assets	19,365	19,229
Trades receivables from brokers and counterparties	10,638	35,099
Receivables from investment maturities	25,000	125,000
Principal, interest and escrow servicing advances	56,952	41,916
Guaranteed mortgage loan claims receivable	59,738	59,659
Operating ROU assets	119,895	125,573
Finance ROU assets	19,856	18,884
Others	126,416	104,125
Total other assets	$ 1,703,285	$ 1,847,813
Operating Lease Right Of Use Asset Statement Of Financial Position	Other assets	Other assets
Finance Lease Right Of Use Asset Statement Of Financial Position	Other assets	Other assets