Mortgage Banking (Tables)

12 Months Ended

Dec. 31, 2017

Mortgage Banking [Abstract]

Schedule of Activity in the Mortgage Servicing Rights

The activity in the MSR is detailed in the table below for the periods presented ($ in thousands):

	Years Ended December 31,
	2017			2016
Balance at beginning of period	$	80,239		$	74,007
Origination of servicing assets		15,860			16,745
Change in fair value:
Due to market changes		(1,050	)		(407	)
Due to runoff		(10,780	)		(10,106	)
Balance at end of period	$	84,269		$	80,239

Schedule of Mortgage Loans Sold and Serviced for Others

The table below details the mortgage loans sold and serviced for others at December 31, 2017 and 2016 ($ in thousands):

	December 31,
	2017		2016
Federal National Mortgage Association	$	4,128,614	$	3,992,349
Government National Mortgage Association		2,421,456		2,291,398
Federal Home Loan Mortgage Corporation		47,071		55,006
Other		26,864		32,589
Total mortgage loans sold and serviced for others	$	6,624,005	$	6,371,342

Changes In The Reserve For Mortgage Loan Servicing Putback Expense

Changes in the reserve for mortgage loan servicing putback expense for mortgage loans were as follows for the periods presented ($ in thousands):

	Years Ended December 31,
	2017			2016			2015
Balance at beginning of period	$	1,130		$	1,685		$	1,170
Provision for putback expenses		(836	)		420			315
Other (1)		706			(975	)		200
Balance at end of period	$	1,000		$	1,130		$	1,685

(1) Includes fair value adjustments for loans transferred due to underwriting issues as well as adjustments based on Trustmark’s mortgage loan servicing putback reserve analysis.