GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2019

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 June 30, 2019, and December 31, 2018, are presented in the table below, in thousands:

	June 30, 2019						December 31, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizing intangible assets:
Core deposit intangibles	$	95,033	$	42,539	$	52,494	$	83,640	$	36,403	$	47,237
Customer relationship intangibles	1,177		953		224		1,177		935		242
Mortgage servicing rights	7,112		1,311		5,801		42,228		12,865		29,363
Commercial servicing rights	6,907		5,528		1,379		6,834		5,125		1,709
Total	$	110,229	$	50,331	$	59,898	$	133,879	$	55,328	$	78,551

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
Six months ending December 31, 2019	$	5,869	$	19	$	876	$	195	$	6,959
Year ending December 31,
2020	10,238		36		1,231		329		11,834
2021	8,520		35		1,055		293		9,903
2022	6,947		35		879		246		8,107
2023	6,061		34		704		159		6,958
2024	4,981		33		528		86		5,628
Thereafter	9,878		32		528		71		10,509
Total	$	52,494	$	224	$	5,801	$	1,379	$	59,898

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, 2019, and June 30, 2018:

	2019			2018
Balance at January 1,	$	1,709		$	2,609
Originations	73			21
Amortization	(403		)	(580		)
Valuation allowance on commercial servicing rights	—			(9		)
Balance at period end	$	1,379		$	2,041
Fair value of commercial servicing rights	$	1,851		$	2,502
Commercial servicing rights, net to servicing portfolio	1.52		%	1.75		%

The following table summarizes, in thousands, the changes in capitalized mortgage servicing rights for the six months ended June 30, 2019, and June 30, 2018:

	2019			2018
Balance at January 1,	$	29,363		$	23,248
Originations	342			2,673
Amortization	(2,395		)	(2,752		)
Valuation allowance on mortgage servicing rights	—			(209		)
Sale of mortgage servicing rights	(20,556		)	—
Acquired mortgage servicing rights	—			6,995
Valuation adjustment	(953		)	—
Balance at period end	$	5,801		$	29,955
Mortgage servicing rights, net to servicing portfolio	0.92		%	0.72		%

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 mortgage servicing rights and any recorded valuation allowance at each respective subsidiary at June 30, 2019, and December 31, 2018:

June 30, 2019	Book Value 15-Year Tranche		Fair Value 15-Year Tranche		Impairment 15-Year Tranche		Book Value 30-Year Tranche		Fair Value 30-Year Tranche		Impairment 30-Year Tranche
Dubuque Bank and Trust Company	$	—	$	—	$	—	$	—	$	—	$	—
First Bank & Trust	1,541		1,389		152		5,271		4,412		859
Total	$	1,541	$	1,389	$	152	$	5,271	$	4,412	$	859
December 31, 2018
Dubuque Bank and Trust Company	$	2,195	$	4,636	$	—	$	20,025	$	36,901	$	—
First Bank & Trust	1,685		1,665		20		5,516		5,478		38
Total	$	3,880	$	6,301	$	20	$	25,541	$	42,379	$	38

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, 2019, and December 31, 2018:

June 30, 2019	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	$	—	$	—	$	—	$	—	$	—	$	—
Premier Valley Bank	33		62		—		159		176		—
Wisconsin Bank & Trust	178		346		—		1,009		1,267		—
Total	$	211	$	408	$	—	$	1,168	$	1,443	$	—
December 31, 2018
Citywide Banks	$	1	$	6	$	—	$	18	$	20	$	—
Premier Valley Bank	45		74		—		178		184		—
Wisconsin Bank & Trust	249		411		—		1,218		1,439		—
Total	$	295	$	491	$	—	$	1,414	$	1,643	$	—