Loans, net and allowance for loan losses - Major Classifications of Loans Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable
Loans, net	$ 1,522,391	$ 1,340,865
Commercial
Accounts, Notes, Loans and Financing Receivable
Loans, net	400,263	365,767
Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans, net	694,459	567,277
Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans, net	294,032	306,218
Consumer
Accounts, Notes, Loans and Financing Receivable
Loans, net	$ 133,637	$ 101,603

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

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Balance Type:	debit
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