Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities Available for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Available For Sale Securities [Line Items]
Within one year, Amortized Cost	$ 3,995
One to five years, Amortized Cost	3,000
Available for sale, Amortized Cost	54,391	$ 56,114
Within one year, Fair Value	3,976
One to five years, Fair Value	2,964
Available for sale, Fair Value	54,116	55,336
Mortgage-backed Securities, Residential
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	13,859	14,465
Available for sale, Fair Value	13,700	$ 14,129
Collateralized Mortgage Obligations
Schedule Of Available For Sale Securities [Line Items]
Available for sale, Amortized Cost	33,537
Available for sale, Fair Value	$ 33,476

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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