Mortgage Servicing Rights (Tables)

12 Months Ended

Dec. 31, 2017

Transfers and Servicing [Abstract]

Summary of Changes in Mortgage Servicing Rights

The following table summarizes the changes in MSRs, which are included in other assets on the consolidated balance sheets:

	2017			2016
	(in thousands)
Amortized cost:
Balance at beginning of year	$	38,822		$	40,944
Originations of mortgage servicing rights	4,968			5,485
Amortization expense	(6,127		)	(7,607		)
Balance at end of year	$	37,663		$	38,822
Valuation allowance:
Balance at beginning of year	$	(1,291	)	$	—
Net deductions (additions) to the valuation allowance	1,291			(1,291		)
Balance at end of year	$	—		$	(1,291	)
Net MSRs at end of year	$	37,663		$	37,531

Schedule Of Servicing Assets Expected Amortization Expense

Estimated MSR amortization expense for the next five years, based on balances as of December 31, 2017 and the estimated remaining lives of the underlying loans, follows (in thousands):

Year
2018	$	6,342
2019	5,905
2020	5,423
2021	4,893
2022	4,311