Allowance for Loan Losses - Additional Information (Details) - USD ($)	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Allowance of purchase impaired loans	0.79%	0.86%
Additional allowance on credit impaired loans	$ 200,000	$ 300,000
Interest income recognized on impaired loans	$ 0	$ 0

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

Name:	us-gaap_ImpairedFinancingReceivableInterestIncomeCashBasisMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration