Loan Servicing, Mortgage Origination, and Loans Held for Sale (Tables)

12 Months Ended

Dec. 31, 2016

Loan Servicing, Mortgage Origination, and Loans Held for Sale

Summary of changes in the fair value of MSRs and its offsetting hedge

	Year Ended December 31,
(Dollars in thousands)	2016		2015		2014
Increase (decrease) in fair value of MSRs	$	560	$	1,015	$	(1,618)
Decay of MSRs		(4,153)		(3,371)		(2,381)
Gains (losses) related to derivatives		(402)		751		3,872
Net effect on statements of income	$	(3,995)	$	(1,605)	$	(127)

Schedule of characteristics and sensitivity analysis of the MSR

	December 31,
(Dollars in thousands)	2016			2015
Composition of residential loans serviced for others
Fixed-rate mortgage loans		99.6	%		99.4	%
Adjustable-rate mortgage loans		0.4	%		0.6	%
Total		100.0	%		100.0	%
Weighted average life		7.70	years		7.05	years
Constant Prepayment rate (CPR)		7.7	%		9.6	%
Weighted average discount rate		9.8	%		9.8	%
Effect on fair value due to change in interest rates
25 basis point increase	$	1,399		$	1,562
50 basis point increase		2,557			2,950
25 basis point decrease		(1,713)			(1,866)
50 basis point decrease		(3,670)			(4,021)