Mortgage Servicing Rights (Tables)

3 Months Ended

Mar. 31, 2017

Transfers And Servicing Of Financial Assets [Abstract]

Schedule of Changes in Mortgage Servicing Rights

Changes in the Company’s mortgage servicing rights were as follows for the three months ended March 31, 2017 and 2016:

	Three Months Ended March 31,
		2017			2016
Carrying value at December 31	$	32,070		$	29,711
Fair value impact of change in accounting policy (See Note 1)		1,011			—
Carrying value at beginning of period		33,081			29,711
Capitalization		15,013			9,130
Amortization		—			(1,457	)
Impairment		—			(773	)
Change in fair value:
Due to pay-offs/pay-downs		(265	)		—
Due to change in valuation inputs or assumptions		(236	)		—
Carrying value at March 31	$	47,593		$	36,611

Schedule of Servicing Income and Expense Included in Mortgage Banking Income

The following table summarizes servicing income and expense included in mortgage banking income and other noninterest expense within the Mortgage Segment operating results, respectively, for the three months ended March 31, 2017 and 2016, respectively:

	Three Months Ended March 31,
		2017			2016
Servicing income:
Servicing income	$	2,748		$	1,996
Change in fair value of mortgage servicing rights		(501	)		—
Gross servicing income		2,247			1,996
Servicing expenses:
Servicing asset amortization		—			1,457
Servicing asset impairment		—			773
Other servicing expenses		926			408
Gross servicing expenses		926			2,638
Net servicing (loss) income	$	1,321		$	(642	)

Schedule of Data and Key Economic Assumptions Related to Mortgage Servicing Rights

Data and key economic assumptions related to the Company’s mortgage servicing rights as of March 31, 2017 and December 31, 2016 are as follows:

	March 31,			December 31,
		2017			2016
Unpaid principal balance	$	4,102,412		$	2,833,958
Weighted-average prepayment speed (CPR)		8.40	%		8.40	%
Estimated impact on fair value of a 10% increase		(1,800	)		(1,256	)
Estimated impact on fair value of a 20% increase		(3,487	)		(2,434	)
Discount rate		9.79	%		9.54	%
Estimated impact on fair value of a 100 bp increase		(1,987	)		(1,394	)
Estimated impact on fair value of a 200 bp increase		(3,821	)		(2,679	)
Weighted-average coupon interest rate		3.65	%		3.59	%
Weighted-average servicing fee (basis points)		28			27
Weighted-average remaining maturity (in months)		326			328