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Loans and the Allowance for Loan Losses (Details) - Credit quality indicators - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Gross loans	$ 3,574,829	$ 3,479,441
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	541,690	553,576
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,326,834	2,204,710
Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	460,611	486,228
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	242,883	232,547
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,811	2,380
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,501,772	3,405,931
Pass [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	528,596	539,961
Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,276,333	2,154,343
Pass [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	455,446	480,319
Pass [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	238,643	228,990
Pass [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,754	2,318
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	35,702	37,816
Special Mention [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	3,102	3,255
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	29,930	31,173
Special Mention [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,670	3,388
Special Mention [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Special Mention [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	37,355	35,694
Substandard [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	9,992	10,360
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	20,571	19,194
Substandard [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	2,495	2,521
Substandard [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	4,240	3,557
Substandard [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans	57	62
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans
Doubtful [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Gross loans

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- Definition

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+ References

No definition available.

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- Definition

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

+ References

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=82891408&loc=d3e4428-111522

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