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

3 Months Ended

Mar. 31, 2017

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, 2017, and December 31, 2016, are presented in the table below, in thousands:

	March 31, 2017						December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	45,968	$	22,211	$	23,757	$	43,504	$	21,049	$	22,455
Mortgage servicing rights	51,302		19,343		31,959		50,467		18,379		32,088
Customer relationship intangible	1,177		866		311		1,177		857		320
Commercial servicing rights	6,597		3,115		3,482		6,504		2,814		3,690
Total	$	105,044	$	45,535	$	59,509	$	101,652	$	43,099	$	58,553

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		Mortgage Servicing Rights		Customer Relationship Intangible		Commercial Servicing Rights		Total
Nine months ending December 31, 2017	$	3,577	$	6,784	$	30	$	632	$	11,023
Year ending December 31,
2018	4,261		6,294		39		789		11,383
2019	3,741		5,395		38		638		9,812
2020	3,264		4,496		37		476		8,273
2021	2,716		3,596		35		408		6,755
2022	1,876		2,697		34		323		4,930
Thereafter	4,322		2,697		98		216		7,333
Total	$	23,757	$	31,959	$	311	$	3,482	$	59,509

Summary of Changes in Servicing Rights

The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the three months ended March 31, 2017, and March 31, 2016:

	2017			2016
Balance at January 1,	$	3,690		$	4,611
Purchased commercial servicing rights	—			190
Originations	93			195
Amortization	(306		)	(536		)
Valuation allowance on commercial servicing rights	5			—
Balance at March 31,	$	3,482		$	4,460
Fair value of commercial servicing rights	$	4,040		$	4,899
Commercial servicing rights, net to servicing portfolio	2.17		%	2.35		%

The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the three months ended March 31, 2017, and March 31, 2016:

	2017			2016
Balance at January 1,	$	32,088		$	30,314
Originations	2,132			2,395
Amortization	(2,261		)	(2,259		)
Balance at March 31,	$	31,959		$	30,450
Fair value of mortgage servicing rights	$	47,564		$	45,210
Mortgage servicing rights, net to servicing portfolio	0.74		%	0.74		%

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, 2017, and December 31, 2016:

March 31, 2017	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
Centennial Bank and Trust	$	17	$	18	$	—	$	103	$	114	$	—
Premier Valley Bank	131		161		—		345		317		28
Wisconsin Bank & Trust	748		929		—		2,166		2,501		—
Total	$	896	$	1,108	$	—	$	2,614	$	2,932	$	28
December 31, 2016
Centennial Bank and Trust	$	19	$	23	$	—	$	107	$	114	$	—
Premier Valley Bank	156		180		—		359		326		33
Wisconsin Bank & Trust	833		997		—		2,249		2,487		—
Total	$	1,008	$	1,200	$	—	$	2,715	$	2,927	$	33