Fair Value of Financial Instruments - Level 3 Quantitative Information (Details)	9 Months Ended	12 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Impaired loans
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost	8.00%	8.00%
Other real estate owned, net
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost	8.00%	6.00%

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration