Borrowings - Summary of Information Pertaining to Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Long Term And Short Term Debt [Line Items]
Short-term borrowings, Balance	$ 479,884	$ 301,207
Long-term borrowings, Balance	114,218	115,145
Total Borrowings, Balance	$ 594,102	$ 416,352
Short-term borrowings, Weighted Average Rate	0.41%	1.76%
Long-term borrowings, Weighted Average Rate	3.17%	3.15%
Total Borrowings, Weighted Average Rate	0.94%	2.14%
Securities sold under repurchase agreements
Long Term And Short Term Debt [Line Items]
Short-term borrowings, Balance	$ 69,644	$ 19,888
Short-term borrowings, Weighted Average Rate	0.25%	0.74%
Short-term borrowings
Long Term And Short Term Debt [Line Items]
Short-term borrowings, Balance	$ 410,240	$ 281,319
Short-term borrowings, Weighted Average Rate	0.44%	1.84%
Long-term borrowings
Long Term And Short Term Debt [Line Items]
Long-term borrowings, Balance	$ 50,180	$ 50,868
Long-term borrowings, Weighted Average Rate	2.59%	2.60%
Junior subordinated debt securities
Long Term And Short Term Debt [Line Items]
Long-term borrowings, Balance	$ 64,038	$ 64,277
Long-term borrowings, Weighted Average Rate	3.63%	3.59%