Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value on a Nonrecurring Basis [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets [Abstract]
Impaired loans, net	$ 2,438	$ 5,087
Other real estate owned, net	1,356	1,356
Level 1 [Member]
Assets [Abstract]
Impaired loans, net	0	0
Other real estate owned, net	0	0
Level 2 [Member]
Assets [Abstract]
Impaired loans, net	0	5,041
Other real estate owned, net	0	0
Level 3 [Member]
Assets [Abstract]
Impaired loans, net	2,438	46
Other real estate owned, net	$ 1,356	$ 1,356