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Borrowings (Advances from the Federal Home Loan Bank) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 419,254	$ 795,354
Federal Home Loan Bank Advances [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 99,779
FHLB, Weighted Average Interest Rate	1.90%
Federal Home Loan Bank Advances [Member] | October 2, 2017 [Member] | Thirty Six Million [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 35,487
FHLB, Weighted Average Interest Rate	1.29%
Settlement Date	Sep. 01, 2017
Maturity Date	Oct. 02, 2017
Federal Home Loan Bank Advances [Member] | October 2, 2017 [Member] | Fourty Million [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 35,487
Federal Home Loan Bank Advances [Member] | January 16, 2018 [Member] | Thirty Million [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 30,000
FHLB, Weighted Average Interest Rate	2.19%
Settlement Date	Jan. 16, 2013
Maturity Date	Jan. 16, 2018
Federal Home Loan Bank Advances [Member] | January 16, 2018 [Member] | Twenty Five Millions [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 25,000
FHLB, Weighted Average Interest Rate	2.18%
Settlement Date	Jan. 16, 2013
Maturity Date	Jan. 16, 2018
Federal Home Loan Bank Advances [Member] | January 16, 2018 [Member] | Fifty Five Millions [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 55,000
Federal Home Loan Bank Advances [Member] | July 20, 2020 [Member] | Ten Million [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 9,292
FHLB, Weighted Average Interest Rate	2.59%
Settlement Date	Jul. 19, 2013
Maturity Date	Jul. 20, 2020

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Maturity date of FHLB advances.

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Date the FHLB advances were made.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

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 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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

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