Goodwill, Core Deposit Intangible and Other Intangible Assets - Estimated Amortization Expense for Core Deposit Intangible, Customer Relationship Intangible and Other Intangible Assets Recognized (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
2019	$ 2,002
2020	7,577
2021	7,012
2022	6,440
2023	4,336
Thereafter	6,538
Total	$ 33,905	$ 33,419

Goodwill, Core Deposit Intangible and Other Intangible Assets - Estimated Amortization Expense for Core Deposit Intangible, Customer Relationship Intangible and Other Intangible Assets Recognized (Details) - USD ($)
$ in Thousands

Sep. 30, 2019

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

$ 2,002

7,577

7,012

6,440

4,336

6,538

$ 33,905

$ 33,419