Regulatory Matters (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total Capital to Risk-Weighted Assets
Actual, amount	$ 634,335	$ 633,228
Actual, ratio	13.20%	13.40%
Tier I Capital to Risk-Weighted Assets
Actual, amount	$ 582,877	$ 576,332
Actual, ratio	12.10%	12.20%
Common Equity Tier 1 to Risk-Weighted Assets
Actual, amount	$ 581,946	$ 575,411
Actual, ratio	12.10%	12.20%
Tier I Capital to Average Assets
Actual, amount	$ 582,877	$ 576,332
Actual, ratio	11.80%	12.10%
Bank
Total Capital to Risk-Weighted Assets
Actual, amount	$ 580,631	$ 581,600
Actual, ratio	12.10%	12.30%
Required to be considered well capitalized, amount	$ 481,571	$ 471,385
Required to be considered well capitalized, ratio	10.00%	10.00%
Tier I Capital to Risk-Weighted Assets
Actual, amount	$ 529,172	$ 524,704
Actual, ratio	11.00%	11.10%
Required to be considered well capitalized, amount	$ 385,257	$ 377,108
Required to be considered well capitalized, ratio	8.00%	8.00%
Common Equity Tier 1 to Risk-Weighted Assets
Actual, amount	$ 529,172	$ 524,704
Actual, ratio	11.00%	11.10%
Required to be considered well capitalized, amount	$ 313,021	$ 306,400
Required to be considered well capitalized, ratio	6.50%	6.50%
Tier I Capital to Average Assets
Actual, amount	$ 529,172	$ 524,704
Actual, ratio	10.70%	11.00%
Required to be considered well capitalized, amount	$ 246,796	$ 238,963
Required to be considered well capitalized, ratio	5.00%	5.00%
Minimum Capital Required - Basel III Fully Phased-In
Total Capital to Risk-Weighted Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 505,786	$ 495,095
Minimum capital required, Basel III phase-in schedule, ratio	10.50%	10.50%
Tier I Capital to Risk-Weighted Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 409,446	$ 400,791
Minimum capital required, Basel III phase-in schedule, ratio	8.50%	8.50%
Common Equity Tier 1 to Risk-Weighted Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 337,191	$ 330,063
Minimum capital required, Basel III phase-in schedule, ratio	7.00%	7.00%
Tier I Capital to Average Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 197,473	$ 191,099
Minimum capital required, Basel III phase-in schedule, ratio	4.00%	4.00%
Minimum Capital Required - Basel III Fully Phased-In | Bank
Total Capital to Risk-Weighted Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 505,649	$ 494,954
Minimum capital required, Basel III phase-in schedule, ratio	10.50%	10.50%
Tier I Capital to Risk-Weighted Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 409,335	$ 400,677
Minimum capital required, Basel III phase-in schedule, ratio	8.50%	8.50%
Common Equity Tier 1 to Risk-Weighted Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 337,100	$ 329,970
Minimum capital required, Basel III phase-in schedule, ratio	7.00%	7.00%
Tier I Capital to Average Assets
Minimum capital required, Basel III phase-in schedule, amount	$ 197,437	$ 191,170
Minimum capital required, Basel III phase-in schedule, ratio	4.00%	4.00%