Capitalized servicing assets (Tables)

12 Months Ended

Dec. 31, 2020

Transfers And Servicing [Abstract]

Servicing Asset at Amortized Cost

Changes in capitalized servicing assets were as follows:

	Residential Mortgage Loans									Commercial Mortgage Loans
For the Year Ended December 31,	2020			2019			2018			2020			2019			2018
	(In thousands)
Beginning balance	$	244,411		$	120,509		$	114,978		$	130,636		$	114,663		$	114,076
Originations		45,101			26,067			28,985			29,306			41,370			26,298
Purchases		—			144,326			454			—			—			—
Amortization		(58,308	)		(46,491	)		(23,908	)		(26,513	)		(25,397	)		(25,711	)
		231,204			244,411			120,509			133,429			130,636			114,663
Valuation allowance		(30,000	)		(7,000	)		—			—			—			—
Ending balance, net	$	201,204		$	237,411		$	120,509		$	133,429		$	130,636		$	114,663

Economic Assumptions Used to Determine Fair Value of Capitalized Servicing Rights and Sensitivity of Value to Changes in Assumptions

	Residential			Commercial
	(Dollars in thousands)
Weighted-average prepayment speeds		14.50	%
Impact on fair value of 10% adverse change	$	(15,279	)
Impact on fair value of 20% adverse change		(29,189	)
Weighted-average OAS		9.18	%
Impact on fair value of 10% adverse change	$	(7,230	)
Impact on fair value of 20% adverse change		(14,020	)
Weighted-average discount rate					18.00	%
Impact on fair value of 10% adverse change				$	(7,024	)
Impact on fair value of 20% adverse change					(13,556	)