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Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - Portfolio loans, net - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | $ 39,148 | $ 37,565 |
Provision (provision reversal) for loan losses | 3,623 | 1,533 | $ 2,422
Losses charged off | (6,389) | (171) | (1,236)
Recoveries | 291 | 221 | 433
Balance at March 31, 2017 | 36,673 | 39,148 | 38,292
Commercial and industrial |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | 28,778 | 26,996 |
Provision (provision reversal) for loan losses | 2,955 | 1,835 | 1,126
Losses charged off | (6,035) | (133) | (613)
Recoveries | 57 | 80 | 205
Balance at March 31, 2017 | 25,755 | 28,778 | 26,473
CRE - owner occupied |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | 2,730 | 2,890 |
Provision (provision reversal) for loan losses | (354) | (249) | 245
Losses charged off | (45) | 0 | (45)
Recoveries | 1 | 89 | 6
Balance at March 31, 2017 | 3,040 | 2,730 | 3,246
Commercial Real Estate Investor Owned |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | 3,324 | 3,420 |
Provision (provision reversal) for loan losses | 39 | (105) | 376
Losses charged off | 0 | 0 | 0
Recoveries | 102 | 9 | 12
Balance at March 31, 2017 | 3,387 | 3,324 | 3,775
Construction and land development |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | 1,302 | 1,304 |
Provision (provision reversal) for loan losses | 51 | (11) | 305
Losses charged off | (5) | 0 | 0
Recoveries | 49 | 9 | 25
Balance at March 31, 2017 | 1,295 | 1,302 | 1,625
Residential real estate |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | 2,036 | 2,023 |
Provision (provision reversal) for loan losses | 451 | (3) | 299
Losses charged off | (265) | (9) | (503)
Recoveries | 62 | 25 | 172
Balance at March 31, 2017 | 2,284 | 2,036 | 2,252
Consumer and other |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2016 | 978 | 932 |
Provision (provision reversal) for loan losses | (47) | 66 | 71
Losses charged off | (39) | (29) | (75)
Recoveries | 20 | 9 | 13
Balance at March 31, 2017 | $ 912 | $ 978 | $ 921

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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