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Borrowings (Advances from the Federal Home Loan Bank) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 800,299	$ 1,371,534
Federal Home Loan Bank Advances [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 105,652
FHLB, Weighted Average Interest Rate	1.61%
Federal Home Loan Bank Advances [Member] | October 3, 2016 [Member] | Fifty Millions [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 36,938
FHLB, Weighted Average Interest Rate	0.57%
Settlement Date	Sep. 01, 2016
Maturity Date	Oct. 03, 2016
Federal Home Loan Bank Advances [Member] | April 3, 2017 [Member] | Four Million [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 4,091
FHLB, Weighted Average Interest Rate	1.24%
Settlement Date	Apr. 03, 2012
Maturity Date	Apr. 03, 2017
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] | 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] | July 20, 2020 [Member] | Ten Million [Member]
Advances From Federal Home Loan Banks [Line Items]
Borrowings	$ 9,623
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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