Non-interest Revenue and Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total non-interest income	$ 824	$ 965	$ 1,009	$ 941	$ 1,147	$ 1,212	$ 1,056	$ 1,234	$ 3,739	$ 4,649
Noninterest income out of scope of Topic 606
Disaggregation of Revenue [Line Items]
Total non-interest income									230	948
Noninterest income in scope of Topic 606
Disaggregation of Revenue [Line Items]
Total non-interest income									3,509	3,701
Deposit Account [Member] | Noninterest income in scope of Topic 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer									3,147	3,337
Mortgage Banking [Member] | Noninterest income in scope of Topic 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer									307	303
Advertising [Member] | Noninterest income in scope of Topic 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer									$ 55	$ 61