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Portfolio Loans - Summary of Portfolio Loans Individually Evaluated for Impairment by Category (Details) - Portfolio loans, net - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | $ 21,702 | $ 11,864
Recorded Investment With No Allowance | 2,374 | 5,072
Recorded Investment With Allowance | 18,064 | 4,915
Total Recorded Investment | 20,438 | 9,987
Related Allowance | 5,801 | 2,335
Average Recorded Investment | 23,569 | 11,924
Commercial and industrial |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 14,895 | 5,554
Recorded Investment With No Allowance | 136 | 509
Recorded Investment With Allowance | 13,134 | 4,204
Total Recorded Investment | 13,270 | 4,713
Related Allowance | 3,785 | 1,953
Average Recorded Investment | 15,666 | 6,970
Commercial - owner occupied |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 0 | 329
Recorded Investment With No Allowance | 0 | 85
Recorded Investment With Allowance | 0 | 113
Total Recorded Investment | 0 | 198
Related Allowance | 0 | 6
Average Recorded Investment | 0 | 301
Commercial - investor owned |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 252 | 927
Recorded Investment With No Allowance | 253 | 927
Recorded Investment With Allowance | 0 | 0
Total Recorded Investment | 253 | 927
Related Allowance | 0 | 0
Average Recorded Investment | 250 | 970
Construction and land development |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 1,907 | 4,349
Recorded Investment With No Allowance | 1,920 | 2,914
Recorded Investment With Allowance | 358 | 530
Total Recorded Investment | 2,278 | 3,444
Related Allowance | 158 | 369
Average Recorded Investment | 2,403 | 3,001
Residential real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 149 | 705
Recorded Investment With No Allowance | 65 | 637
Recorded Investment With Allowance | 64 | 68
Total Recorded Investment | 129 | 705
Related Allowance | 3 | 7
Average Recorded Investment | 652 | 682
Consumer and other |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 4,499 | 0
Recorded Investment With No Allowance | 0 | 0
Recorded Investment With Allowance | 4,508 | 0
Total Recorded Investment | 4,508 | 0
Related Allowance | 1,855 | 0
Average Recorded Investment | $ 4,598 | $ 0

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