Deposits - Interest Expense on Deposit Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Deposits [Abstract]
Interest-bearing demand	$ 108	$ 79
Statement savings	29	34
Money market	5,027	3,550
Certificates of deposit, retail	9,549	5,825
Certificates of deposit, brokered	3,283	1,730
Interest expense, deposits	$ 17,996	$ 11,218

Amount of interest expense on domestic brokered deposit liabilities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.6)
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

Name:	us-gaap_InterestExpenseDomesticDepositLiabilitiesBrokered
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration