Goodwill, Core Deposit Premium and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets

The gross carrying amount of these intangible assets and the associated accumulated amortization at March 31, 2018, and December 31, 2017, are presented in the table below, in thousands:

	March 31, 2018						December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	69,731	$	28,939	$	40,792	$	62,008	$	27,086	$	34,922
Customer relationship intangibles	1,177		906		271		1,177		896		281
Mortgage servicing rights	42,249		19,084		23,165		42,139		18,891		23,248
Commercial servicing rights	6,740		4,434		2,306		6,719		4,110		2,609
Total	$	119,897	$	53,363	$	66,534	$	112,043	$	50,983	$	61,060

Schedule of Estimated Future Amortization Expense of Amortizable Intangible Assets

The following table shows the estimated future amortization expense for amortizable intangible assets, in thousands:

	Core Deposit Intangibles		Customer Relationship Intangibles		Mortgage Servicing Rights		Commercial Servicing Rights		Total
Nine months ending December 31, 2018	$	5,957	$	29	$	6,776	$	471	$	13,233
Year ending December 31,
2019	7,092		38		4,097		522		11,749
2020	6,220		37		3,512		411		10,180
2021	5,323		36		2,927		354		8,640
2022	4,175		34		2,341		290		6,840
2023	3,691		33		1,756		163		5,643
Thereafter	8,334		64		1,756		95		10,249
Total	$	40,792	$	271	$	23,165	$	2,306	$	66,534

Summary of Changes in Servicing Rights

The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the three months ended March 31, 2018, and March 31, 2017:

	2018			2017
Balance at January 1,	$	23,248		$	32,088
Originations	1,162			2,132
Amortization	(1,245		)	(2,261		)
Balance at period end	$	23,165		$	31,959
Fair value of mortgage servicing rights	$	40,434		$	47,564
Mortgage servicing rights, net to servicing portfolio	0.66		%	0.74		%

The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the three months ended March 31, 2018, and March 31, 2017:

	2018			2017
Balance at January 1,	$	2,609		$	3,690
Originations	21			93
Amortization	(322		)	(306		)
Valuation allowance on commercial servicing rights	(2		)	5
Balance at period end	$	2,306		$	3,482
Fair value of commercial servicing rights	$	2,781		$	4,040
Commercial servicing rights, net to servicing portfolio	1.84		%	2.17		%

Schedule of Servicing Asset at Fair Value and Amortized Cost

The following table summarizes, in thousands, the book value, the fair value of each tranche of the commercial servicing rights and any recorded valuation allowance at each respective subsidiary at March 31, 2018, and December 31, 2017:

March 31, 2018	Book Value- Less than 20 Years		Fair Value- Less than 20 Years		Impairment- Less than 20 Years		Book Value- More than 20 Years		Fair Value- More than 20 Years		Impairment- More than 20 Years
Citywide Banks	$	6	$	10	$	—	$	33	$	36	$	—
Premier Valley Bank	72		104		—		286		272		14
Wisconsin Bank & Trust	368		534		—		1,554		1,825		—
Total	$	446	$	648	$	—	$	1,873	$	2,133	$	14
December 31, 2017
Citywide Banks	$	8	$	11	$	—	$	34	$	37	$	—
Premier Valley Bank	83		110		—		303		291		12
Wisconsin Bank & Trust	446		619		—		1,747		2,153		—
Total	$	537	$	740	$	—	$	2,084	$	2,481	$	12