Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

The following table presents the gross carrying value of core deposit intangible assets and accumulated amortization as of March 31, 2018 and December 31, 2017:

($ in thousands)	March 31, 2018			December 31, 2017
Gross balance (1)	$	86,099		$	100,166
Accumulated amortization (1)	(67,562		)	(79,112		)
Net carrying balance	$	18,537		$	21,054

(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 March 31, 2018:

Year Ended December 31,	Amount ($ in thousands)
Remainder of 2018	$	4,008
2019	4,518
2020	3,634
2021	2,749
2022	1,865
Thereafter	1,763
Total	$	18,537