Goodwill and other intangibles (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill [Table Text Block]

The following table shows the activity in goodwill and other intangible assets for the three months ended March 31, 2019 and 2018.

(in thousands)	Goodwill		Other intangible assets		Total
December 31, 2017	$	72,334	$	—	$	72,334
Acquired goodwill and other intangible assets	—		—		—
Amortization	—		—		—
March 31, 2018	$	72,334	$	—	$	72,334
December 31, 2018	$	112,739	$	6,971	$	119,710
Acquired goodwill and other intangible assets	—		—		—
Amortization	—		289		289
March 31, 2019	$	112,739	$	6,682	$	119,421

Intangible Assets Disclosure [Text Block]

The following table shows the balance of acquired intangible assets as of March 31, 2019. Park had no acquired intangible assets as of March 31, 2018.

	2019
(in thousands)	Gross Carrying Amount		Accumulated Amortization
Other intangible assets:
Core deposit intangibles	$	6,249	$	867
Trade name intangible	1,300		—
Total	$	7,549	$	867

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

Estimated amortization expense for each of the periods listed below follows:

(in thousands)	Total
Nine months ending December 31, 2019	$	945
2020	1,149
2021	869
2022	629
2023	521