Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill by reporting unit

The following tables present changes in the carrying amount of goodwill by reporting unit during the six months ended June 30, 2019 and 2018:

($ in thousands)	Consumer and Business Banking			Commercial Banking		Total
Beginning balance, January 1, 2018	$	357,207		$	112,226	$	469,433
Disposition of the DCB branches	(3,886		)	—		(3,886		)
Ending balance, June 30, 2018	$	353,321		$	112,226	$	465,547

($ in thousands)	Consumer and Business Banking		Commercial Banking		Total
Beginning balance, January 1, 2019	$	353,321	$	112,226	$	465,547
Acquisition of Enstream Capital Markets, LLC	—		150		150
Ending balance, June 30, 2019	$	353,321	$	112,376	$	465,697

Schedule of gross carrying value of core deposit intangible assets and accumulated amortization

The following table presents the gross carrying amount of core deposit intangible assets and accumulated amortization as of June 30, 2019 and December 31, 2018:

($ in thousands)	June 30, 2019			December 31, 2018
Gross balance (1)	$	86,099		$	86,099
Accumulated amortization (1)	(73,896		)	(71,570		)
Net carrying balance (1)	$	12,203		$	14,529

(1)

Excludes fully amortized core deposit intangible assets.

Schedule of estimated future amortization expense of core deposit intangibles

The following table presents the estimated future amortization expense of core deposit intangibles as of June 30, 2019:

($ in thousands)	Amount
Remainder of 2019	$	2,192
2020	3,634
2021	2,749
2022	1,865
2023	1,199
Thereafter	564
Total	$	12,203