Securities - Summary of Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2020 USD ($) numberOfSecurities	Dec. 31, 2019 USD ($) numberOfSecurities
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	211	121
Less Than 12 Months, Fair Value	$ 100,531	$ 131,727
Less Than 12 Months, Gross Unrealized Losses	$ (5,436)	$ (418)
12 Months or More, Number of Securities | numberOfSecurities	8	22
12 Months or More, Fair Value	$ 1,463	$ 15,454
12 Months or More, Gross Unrealized Losses	$ (539)	$ (181)
Total, Number of Securities | numberOfSecurities	219	143
Total, Fair Value	$ 101,994	$ 147,181
Total, Gross Unrealized Losses	$ (5,975)	$ (599)
Held to maturity:
Less Than 12 Months, Number of Securities | numberOfSecurities	0	9
Less Than 12 Months, Fair Value	$ 0	$ 11,057
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ (60)
12 Months or More, Number of Securities | numberOfSecurities	0	19
12 Months or More, Fair Value	$ 0	$ 27,358
12 Months or More, Gross Unrealized Losses	$ 0	$ (84)
Total, Number of Securities | numberOfSecurities	0	28
Total, Fair Value	$ 0	$ 38,415
Total, Gross Unrealized Losses	$ 0	$ (144)
U.S. Treasuries
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	1	0
Less Than 12 Months, Fair Value	$ 15,000	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ 0
12 Months or More, Number of Securities | numberOfSecurities	0	0
12 Months or More, Fair Value	$ 0	$ 0
12 Months or More, Gross Unrealized Losses	$ 0	$ 0
Total, Number of Securities | numberOfSecurities	1	0
Total, Fair Value	$ 15,000	$ 0
Total, Gross Unrealized Losses	$ 0	$ 0
U.S. Government Agencies
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	0	1
Less Than 12 Months, Fair Value	$ 0	$ 4,398
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ (1)
12 Months or More, Number of Securities | numberOfSecurities	0	1
12 Months or More, Fair Value	$ 0	$ 149
12 Months or More, Gross Unrealized Losses	$ 0	$ (1)
Total, Number of Securities | numberOfSecurities	0	2
Total, Fair Value	$ 0	$ 4,547
Total, Gross Unrealized Losses	$ 0	$ (2)
Held to maturity:
Less Than 12 Months, Number of Securities | numberOfSecurities	0	2
Less Than 12 Months, Fair Value	$ 0	$ 2,177
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ (2)
12 Months or More, Number of Securities | numberOfSecurities	0	8
12 Months or More, Fair Value	$ 0	$ 15,965
12 Months or More, Gross Unrealized Losses	$ 0	$ (30)
Total, Number of Securities | numberOfSecurities	0	10
Total, Fair Value	$ 0	$ 18,142
Total, Gross Unrealized Losses	$ 0	$ (32)
Corporate debt securities
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	191	42
Less Than 12 Months, Fair Value	$ 79,265	$ 21,269
Less Than 12 Months, Gross Unrealized Losses	$ (5,284)	$ (174)
12 Months or More, Number of Securities | numberOfSecurities	8	12
12 Months or More, Fair Value	$ 1,463	$ 3,184
12 Months or More, Gross Unrealized Losses	$ (539)	$ (128)
Total, Number of Securities | numberOfSecurities	199	54
Total, Fair Value	$ 80,728	$ 24,453
Total, Gross Unrealized Losses	$ (5,823)	$ (302)
Municipal bonds
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	6	9
Less Than 12 Months, Fair Value	$ 1,383	$ 4,285
Less Than 12 Months, Gross Unrealized Losses	$ (9)	$ (14)
12 Months or More, Number of Securities | numberOfSecurities	0	0
12 Months or More, Fair Value	$ 0	$ 0
12 Months or More, Gross Unrealized Losses	$ 0	$ 0
Total, Number of Securities | numberOfSecurities	6	9
Total, Fair Value	$ 1,383	$ 4,285
Total, Gross Unrealized Losses	$ (9)	$ (14)
Held to maturity:
Less Than 12 Months, Number of Securities | numberOfSecurities	0	0
Less Than 12 Months, Fair Value	$ 0	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ 0
12 Months or More, Number of Securities | numberOfSecurities	0	1
12 Months or More, Fair Value	$ 0	$ 50
12 Months or More, Gross Unrealized Losses	$ 0	$ 0
Total, Number of Securities | numberOfSecurities	0	1
Total, Fair Value	$ 0	$ 50
Total, Gross Unrealized Losses	$ 0	$ 0
Collateralized mortgage obligations
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	3	12
Less Than 12 Months, Fair Value	$ 4,252	$ 10,022
Less Than 12 Months, Gross Unrealized Losses	$ (134)	$ (43)
12 Months or More, Number of Securities | numberOfSecurities	0	0
12 Months or More, Fair Value	$ 0	$ 0
12 Months or More, Gross Unrealized Losses	$ 0	$ 0
Total, Number of Securities | numberOfSecurities	3	12
Total, Fair Value	$ 4,252	$ 10,022
Total, Gross Unrealized Losses	$ (134)	$ (43)
Mortgage-backed securities
Available for sale
Less Than 12 Months, Number of Securities | numberOfSecurities	10	57
Less Than 12 Months, Fair Value	$ 631	$ 91,753
Less Than 12 Months, Gross Unrealized Losses	$ (9)	$ (186)
12 Months or More, Number of Securities | numberOfSecurities	0	9
12 Months or More, Fair Value	$ 0	$ 12,121
12 Months or More, Gross Unrealized Losses	$ 0	$ (52)
Total, Number of Securities | numberOfSecurities	10	66
Total, Fair Value	$ 631	$ 103,874
Total, Gross Unrealized Losses	$ (9)	$ (238)
Held to maturity:
Less Than 12 Months, Number of Securities | numberOfSecurities	0	7
Less Than 12 Months, Fair Value	$ 0	$ 8,880
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ (58)
12 Months or More, Number of Securities | numberOfSecurities	0	10
12 Months or More, Fair Value	$ 0	$ 11,343
12 Months or More, Gross Unrealized Losses	$ 0	$ (54)
Total, Number of Securities | numberOfSecurities	0	17
Total, Fair Value	$ 0	$ 20,223
Total, Gross Unrealized Losses	$ 0	$ (112)