Deposits - Schedule of Components of Weighted Average Interest Rate and Balance of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Weighted Average Rate Domestic Deposit Liabilities [Abstract]
Noninterest-bearing deposits	0.00%	0.00%
Demand deposits	0.43%	0.17%
Savings deposits	0.26%	0.10%
Time Deposits	1.12%	0.87%
Deposits	0.38%	0.24%
Deposits
Noninterest-bearing deposits	$ 1,040,026	$ 918,337
Demand deposits	1,109,438	909,963
Savings deposits	830,706	803,078
Time deposits	574,749	626,189
Total deposits	$ 3,554,919	$ 3,257,567

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- References

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- Definition

Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).

+ References

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- Definition

Amount of money in interest-bearing domestic accounts that entitle the depositor to withdraw funds at any time without prior notice, also known as demand deposits.

+ References

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- Definition

The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.

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- Definition

Amount of time deposit liabilities, including certificates of deposit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=50488274&loc=d3e64164-112818

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Industry Guide
-Number 3
-Section V
-Paragraph D-E

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- Definition

Weighted average interest rate calculated at point in time for domestic deposit liability.

+ References

No definition available.

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- Definition

The weighted average interest rate for domestic demand deposit liabilities.

+ References

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- Definition

The weighted average interest rate for domestic savings deposit liabilities.

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The weighted average interest rate for domestic time deposit liabilities.

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- Definition

The weighted average interest rate for domestic noninterest-bearing deposit liabilities.

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