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Derivatives and Hedging Activities (Gains and Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivatives Not Designated as a Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	$ (36)	$ (90)	$ (427)	$ (957)
Derivatives Not Designated as a Hedging Instruments [Member] | Interest rate products [Member] | Other income (expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	(36)	(95)	(428)	(1,060)
Derivatives Not Designated as a Hedging Instruments [Member] | Credit contracts [Member] | Other income (expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	0	5	1	103
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	(59)	(129)	(166)	(366)
Designated as Hedging Instrument [Member] | Interest rate products [Member] | Other income (expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Income on derivatives for the three months ended	$ (59)	$ (129)	$ (166)	$ (366)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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- Definition

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+ References

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