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Loans and Allowance for Credit Losses (Details 2) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016
--- | --- | --- | ---
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | $ 33,534 | $ 34,471 | $ 34,848
Loans collectively evaluated for impairment | 6,050,670 | 5,643,422 | 5,447,127
Net loans | 6,084,204 | 5,677,893 | 5,481,975
Commercial Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | 8,309 | 10,437 | 12,448
Loans collectively evaluated for impairment | 1,235,875 | 1,190,291 | 1,117,594
Net loans | 1,244,184 | 1,200,728 | 1,130,042
Commercial Real Estate - Income Producing Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | 10,241 | 15,057 | 14,648
Loans collectively evaluated for impairment | 2,888,707 | 2,494,460 | 2,536,538
Net loans | 2,898,948 | 2,509,517 | 2,551,186
Commercial Real Estate - Owner Occupied Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | 6,570 | 2,093 | 2,517
Loans collectively evaluated for impairment | 743,010 | 638,777 | 587,910
Net loans | 749,580 | 640,870 | 590,427
Real Estate Mortgage - Residential Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment |  | 241 | 244
Loans collectively evaluated for impairment | 109,460 | 152,507 | 154,195
Net loans | 109,460 | 152,748 | 154,439
Construction Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | 7,728 | 6,517 | 4,878
Loans collectively evaluated for impairment | 963,593 | 1,052,052 | 937,935
Net loans | 971,321 | 1,058,569 | 942,813
Home Equity Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | 594 |  | 113
Loans collectively evaluated for impairment | 101,304 | 105,096 | 106,743
Net loans | 101,898 | 105,096 | 106,856
Other Consumer Portfolio Segment [Member] |  |  |
Recorded investment in loans: |  |  |
Loans individually evaluated for impairment | 92 | 126 |
Loans collectively evaluated for impairment | 8,721 | 10,239 | 6,212
Net loans | $ 8,813 | $ 10,365 | $ 6,212

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