Goodwill and other intangibles (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill [Table Text Block]

The following tables show the activity in goodwill and other intangible assets for the three-month and six-month periods ended June 30, 2020 and 2019.

(in thousands)	Goodwill		Other intangible assets		Total
April 1, 2019	$	112,739	$	6,682	$	119,421
Acquired goodwill and other intangible assets	45,318		10,251		55,569
Amortization	—		702		702
June 30, 2019	$	158,057	$	16,231	$	174,288
April 1, 2020	$	159,595	$	10,917	$	170,512
Acquired goodwill and other intangible assets	—		—		—
Amortization	—		607		607
June 30, 2020	$	159,595	$	10,310	$	169,905

(in thousands)	Goodwill		Other intangible assets		Total
December 31, 2018	$	112,739	$	6,971	$	119,710
Acquired goodwill and other intangible assets	45,318		10,251		55,569
Amortization	—		991		991
June 30, 2019	$	158,057	$	16,231	$	174,288
December 31, 2019	$	159,595	$	11,523	$	171,118
Acquired goodwill and other intangible assets	—		—		—
Amortization	—		1,213		1,213
June 30, 2020	$	159,595	$	10,310	$	169,905

Intangible Assets Disclosure [Text Block]

The following table shows the balance of acquired intangible assets as of June 30, 2020 and December 31, 2019.

	June 30, 2020				December 31, 2019
(in thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Other intangible assets:
Core deposit intangible assets	$	14,456	$	4,146	$	14,456	$	2,933
Trade name intangible assets	1,300		1,300		1,300		1,300
Total	$	15,756	$	5,446	$	15,756	$	4,233

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Estimated amortization expense related to core deposit intangible assets for each of the next five years follows:

(in thousands)	Total
Six months ending December 31, 2020	$	1,050
2021	1,798
2022	1,487
2023	1,323
2024	1,215