Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Original Carrying Amount of Amortized Intangible Assets

For intangible assets related to business combinations, the following is a summary of the gross carrying amount and accumulated amortization of amortized intangible assets and the carrying amount of unamortized intangible assets:

(dollars in thousands)	As of December 31,
	2015		2014
Core deposit premium related to business combinations:
Carrying amount	$	13,546	$	13,102
Accumulated amortization	10,569		9,147
Net core deposit premium	$	2,977	$	3,955

Estimated Amortization Expense for Intangible Assets

These estimates are subject to change in future periods to the extent management determines it is necessary to make adjustments to the carrying value or estimated useful lives of amortized intangible assets.

(dollars in thousands)	Estimated Amortization Expense
2016	$	908
2017	685
2018	685
2019	583
2020	73
Thereafter	43
Total	$	2,977