Capitalized servicing assets (Tables)

12 Months Ended

Dec. 31, 2018

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,	2018			2017			2016			2018			2017			2016
	(In thousands)
Beginning balance	$	114,978		$	117,351		$	118,303		$	114,076		$	103,764		$	83,692
Originations		28,985			28,792			28,618			26,298			34,620			40,117
Purchases		454			699			638			—			—			—
Amortization		(23,908	)		(31,864	)		(30,208	)		(25,711	)		(24,308	)		(20,045	)
		120,509			114,978			117,351			114,663			114,076			103,764
Valuation allowance		—			—			—			—			—			—
Ending balance, net	$	120,509		$	114,978		$	117,351		$	114,663		$	114,076		$	103,764

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		10.99	%
Impact on fair value of 10% adverse change	$	(9,327	)
Impact on fair value of 20% adverse change		(17,925	)
Weighted-average OAS		9.63	%
Impact on fair value of 10% adverse change	$	(6,758	)
Impact on fair value of 20% adverse change		(13,135	)
Weighted-average discount rate					18.00	%
Impact on fair value of 10% adverse change				$	(6,029	)
Impact on fair value of 20% adverse change					(11,626	)