Goodwill and other intangible assets (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of CDI activity

The following table sets forth activity for CDI for the three months ended March 31, 2017 and 2016 (dollars in thousands).

	Three months ended March 31,
	2017			2016
Gross CDI balance, beginning of period	$	14,966		$	8,196
Accumulated amortization, beginning of period	(2,649		)	(1,333		)
CDI, net, beginning of period	12,317			6,863
Established through acquisitions	—			6,427
CDI current period amortization	(374		)	(205		)
Total CDI, end of period	$	11,943		$	13,085

Schedule of CDI future amortization expenses

The following table provides the estimated future amortization expense of CDI for the remaining period ending December 31, 2017 and the succeeding four years (dollars in thousands):

Years Ending December 31,
2017	$	1,122
2018	1,497
2019	1,497
2020	1,497
2021	1,497