MORTGAGE SERVICING RIGHTS

Mortgage servicing rights--Mortgage loans serviced for others are not included in the accompanying consolidated balance sheets. The unpaid balances of these loans as of March 31, 2019 and December 31, 2018 were $517,746 and $518,476, respectively, and consisted of one to four family residential real estate loans. These loans are serviced primarily for the Federal Home Loan Mortgage Corporation, Federal Home Loan Bank and the Federal National Mortgage Association.

Custodial escrow balances maintained in connection with the foregoing loan servicing, and included in deposits were $5,030 and $3,182, at March 31, 2019 and December 31, 2018, respectively. Mortgage servicing rights activity for the periods ended March 31, 2019 and December 31, 2018 were as follows:



	Three Months Ended			Three Months Ended
	March 31, 2019			December 31, 2018
Balance at beginning of period	$	4,486		$	1,840
MSR asset acquired	—			2,721
Increase in MSR assets resulting from transfers of financial assets	129			100
Amortization during the period	(191		)	(175		)
Valuation allowance at end of period	—			—
Net book value at end of period	$	4,424		$	4,486
Fair value of MSR asset at end of period	$	4,705		$	5,214
Residential mortgage loans serviced for others	$	517,746		$	518,476
Net book value of MSR asset to loans serviced for others	0.86		%	0.87		%