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Loans and the Allowance for Loan Losses (Details) - Allowance for loan and lease losses - USD ($) $ in Thousands | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | --- | ---
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment | $ 162 |  | $ 145 |  |  |
ALLL, collectively evaluated for impairment | 27,239 |  | 25,599 |  |  |
ALLL, acquired portfolio | 1,000 |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | 28,401 | $ 26,901 | 25,744 | $ 32,763 | $ 29,074 | $ 26,572
Gross loans |  |  |  |  |  |
Loans Receivable, individually evaluated for impairment | 26,005 |  | 30,991 |  |  |
Loans Receivable, collectively evaluated for impairment | 3,196,508 |  | 2,783,922 |  |  |
Loans Receivable, acquired portfolio | 534,837 |  | 656,448 |  |  |
Loans Receivables, acquired with deteriorated credit quality | 8,211 |  | 8,080 |  |  |
Total gross loans | 3,765,561 |  | 3,479,441 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment |  |  |  |  |  |
ALLL, collectively evaluated for impairment | 7,238 |  | 6,632 |  |  |
ALLL, acquired portfolio |  |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | 7,238 | 6,667 | 6,632 | 15,548 | 13,097 | 10,949
Gross loans |  |  |  |  |  |
Loans Receivable, individually evaluated for impairment | 3,184 |  | 3,637 |  |  |
Loans Receivable, collectively evaluated for impairment | 579,510 |  | 517,869 |  |  |
Loans Receivable, acquired portfolio | 19,797 |  | 24,972 |  |  |
Loans Receivables, acquired with deteriorated credit quality | 7,951 |  | 7,098 |  |  |
Total gross loans | 610,442 |  | 553,576 |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment | 162 |  | 145 |  |  |
ALLL, collectively evaluated for impairment | 14,227 |  | 12,438 |  |  |
ALLL, acquired portfolio | 1,000 |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | 15,389 | 14,118 | 12,583 | 11,371 | 10,941 | 10,926
Gross loans |  |  |  |  |  |
Loans Receivable, individually evaluated for impairment | 17,306 |  | 19,532 |  |  |
Loans Receivable, collectively evaluated for impairment | 2,003,595 |  | 1,621,745 |  |  |
Loans Receivable, acquired portfolio | 449,796 |  | 562,451 |  |  |
Loans Receivables, acquired with deteriorated credit quality | 260 |  | 982 |  |  |
Total gross loans | 2,470,957 |  | 2,204,710 |  |  |
Commercial Construction Portfolio Segment [Member] |  |  |  |  |  |
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment |  |  |  |  |  |
ALLL, collectively evaluated for impairment | 4,241 |  | 4,789 |  |  |
ALLL, acquired portfolio |  |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | 4,241 | 4,574 | 4,789 | 4,040 | 3,617 | 3,253
Gross loans |  |  |  |  |  |
Loans Receivable, individually evaluated for impairment | 4,271 |  | 5,909 |  |  |
Loans Receivable, collectively evaluated for impairment | 426,779 |  | 478,865 |  |  |
Loans Receivable, acquired portfolio |  |  | 1,454 |  |  |
Loans Receivables, acquired with deteriorated credit quality |  |  |  |  |  |
Total gross loans | 431,050 |  | 486,228 |  |  |
Residential Real Estate Portfolio Segment [Member] |  |  |  |  |  |
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment |  |  |  |  |  |
ALLL, collectively evaluated for impairment | 985 |  | 958 |  |  |
ALLL, acquired portfolio |  |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | 985 | 1,008 | 958 | 1,091 | 1,074 | 976
Gross loans |  |  |  |  |  |
Loans Receivable, individually evaluated for impairment | 1,192 |  | 1,851 |  |  |
Loans Receivable, collectively evaluated for impairment | 185,135 |  | 163,686 |  |  |
Loans Receivable, acquired portfolio | 64,780 |  | 67,010 |  |  |
Loans Receivables, acquired with deteriorated credit quality |  |  |  |  |  |
Total gross loans | 251,107 |  | 232,547 |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment |  |  |  |  |  |
ALLL, collectively evaluated for impairment | 2 |  | 3 |  |  |
ALLL, acquired portfolio |  |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | 2 | 3 | 3 | 4 | 4 | 4
Gross loans |  |  |  |  |  |
Loans Receivable, individually evaluated for impairment | 52 |  | 62 |  |  |
Loans Receivable, collectively evaluated for impairment | 1,489 |  | 1,757 |  |  |
Loans Receivable, acquired portfolio | 464 |  | 561 |  |  |
Loans Receivables, acquired with deteriorated credit quality |  |  |  |  |  |
Total gross loans | 2,005 |  | 2,380 |  |  |
Unallocated [Member] |  |  |  |  |  |
ALLL |  |  |  |  |  |
ALLL, individually evaluated for impairment |  |  |  |  |  |
ALLL, collectively evaluated for impairment | 546 |  | 779 |  |  |
ALLL, acquired portfolio |  |  |  |  |  |
ALLL, acquired with deteriorated credit quality |  |  |  |  |  |
Total ALLL | $ 546 | $ 531 | $ 779 | $ 709 | $ 341 | $ 464

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