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

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

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

The gross carrying amount of other intangible assets and the associated accumulated amortization at June 30, 2016, and December 31, 2015, are presented in the table below, in thousands:

	June 30, 2016						December 31, 2015
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	43,504	$	18,632	$	24,872	$	37,118	$	15,460	$	21,658
Mortgage servicing rights	48,355		17,068		31,287		45,744		15,430		30,314
Customer relationship intangible	1,177		836		341		1,177		815		362
Commercial servicing rights	6,280		1,913		4,367		5,685		1,074		4,611
Total	$	99,316	$	38,449	$	60,867	$	89,724	$	32,779	$	56,945

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
Six months ending December 31, 2016	$	2,460	$	5,135	$	20	$	492	$	8,107
Year ending December 31,
2017	4,419		6,538		40		951		11,948
2018	3,909		5,604		39		858		10,410
2019	3,426		4,670		37		694		8,827
2020	2,981		3,736		37		503		7,257
2021	2,463		2,802		36		429		5,730
Thereafter	5,214		2,802		132		440		8,588
Total	$	24,872	$	31,287	$	341	$	4,367	$	60,867

Summary of Changes in Servicing Rights

The following table summarizes, in thousands, the changes in capitalized commercial servicing rights for the six months ended June 30, 2016, and June 30, 2015:

	2016			2015
Balance at January 1,	$	4,611		$	—
Purchased commercial servicing rights	190			4,255
Originations	404			141
Amortization	(792		)	(452		)
Valuation allowance on commercial servicing rights	(46		)	—
Balance at June 30,	$	4,367		$	3,944
Fair value of commercial servicing rights	$	4,791		$	4,429
Commercial servicing rights, net to servicing portfolio	2.44		%	2.87		%

The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the six months ended June 30, 2016, and June 30, 2015:

	2016			2015
Balance at January 1,	$	30,314		$	24,984
Originations	5,799			7,015
Amortization	(4,826		)	(4,360		)
Balance at June 30,	$	31,287		$	27,639
Fair value of mortgage servicing rights	$	39,881		$	36,971
Mortgage servicing rights, net to servicing portfolio	0.74		%	0.73		%

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 June 30, 2016 and December 31, 2015:

June 30, 2016	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	$	28	$	30	$	—	$	140	$	148	$	—
Premier Valley Bank	191		208		—		387		349		38
Wisconsin Bank & Trust	917		909		8		2,750		3,147		—
Total	$	1,136	$	1,147	$	8	$	3,277	$	3,644	$	38
December 31, 2015
Centennial Bank and Trust	$	—	$	—	$	—	$	—	$	—	$	—
Premier Valley Bank	189		200		—		417		432		—
Wisconsin Bank & Trust	1,048		1,097		—		2,957		3,173		—
Total	$	1,237	$	1,297	$	—	$	3,374	$	3,605	$	—