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Summary of Significant Accounting Policies - Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) lease
Short-term lease expense | $	$ 136
Operating lease cost | $	$ 7,575
Weighted-average remaining lease term-operating leases (Year)	7 years 6 months
Weighted average discount rate-operating leases	3.80%
Minimum [Member]
Term of contract	2 months
Maximum [Member]
Term of contract	12 years
Branches And Office Space [Member]
Number of leases	21
Vehicles [Member]
Number of leases	9
Equipment [Member]
Number of leases	1

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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