Federal Home Loan Bank Borrowings (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]
Within 1 year	$ 244,018
Over 1 to 2 years	99,365
Over 2 to 3 years	61,896
Over 3 to 4 years	3,985
Over 4 to 5 years	7,370
Over 5 years	3,510
Total	$ 420,144
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due [Abstract]
Within 1 year	2.38%
Over 1 to 2 years	2.68%
Over 2 to 3 years	2.20%
Over 3 to 4 years	1.93%
Over 4 to 5 years	3.24%
Over 5 years	0.18%
Total	2.42%

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

Name:	us-gaap_AdvancesFromFederalHomeLoanBanks
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823