Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Amortized intangible assets - core deposits [Abstract]
Gross Carrying Amount		$ 11,916	$ 6,118
Accumulated Amortization		4,912	4,532
Unamortized intangible assets - goodwill [Abstract]
Gross Carrying Amount	$ 29,012	29,012	$ 0
Increases in gross carrying amount of core deposit intangibles	5,800
Increases in goodwill	$ 29,000
Expected residual value of core deposit intangible asset		0
Expected amortization period of core deposit intangible asset	10 years
Weighted average amortization period of core deposit intangible asset	5 years 2 months 12 days
Summary of estimated intangible amortization [Abstract]
Six months ending December 31, 2018		588
2019		1,089
2020		1,020
2021		970
2022		785
2023 and thereafter		2,552
Total		$ 7,004
Goodwill [Roll Forward]
Balance at beginning of year	$ 0
Acquired during the year	29,012
Balance at end of the period	$ 29,012