Mortgage Servicing Rights (Tables)

12 Months Ended

Dec. 31, 2017

Text Block [Abstract]

Fair Value of Mortgage Servicing Rights

The following tables summarize the activity in, and the main assumptions we used to determine the fair value of mortgage servicing rights for the periods indicated (dollars in thousands):

	Years ended December 31,
	2017			2016			2015
Balance at beginning of period	$	6,595		$	7,618		$	7,378
Acquisition		—			—			—
Originations		810			1,161			941
Change in fair value		(718	)		(2,184	)		(701	)
Balance at end of period	$	6,687		$	6,595		$	7,618
Contractually specified servicing fees, late fees and ancillary fees earned	$	2,076		$	2,065		$	2,164
Balance of loans serviced at:
Beginning of period	$	816,623		$	817,917		$	840,288
End of period	$	811,065		$	816,623		$	817,917
Weighted-average prepayment speed (CPR)		8.9	%		8.8	%		9.8	%
Weighted-average discount rate		13.0	%		14.0	%		10.0	%