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Stock Options and Restricted Shares - Narrative (Details) - USD ($) |  | 3 Months Ended
--- | --- | ---
Jul. 31, 2015 | Mar. 31, 2019 | Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense |  | $ 4,913,000 | $ 4,448,000
Remaining Share-Based Compensation on Unvested Restricted Stock Awards |  | $ 49,100,000 |
Weighted Average Remaining Period of Sharebased Compensation Expense |  | 1 year 9 months 7 days |
2018 Equity Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for issuances (in shares) |  | 1,250,000 |
BNC Bancorp 2013 Omnibus Stock Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for issuances (in shares) |  | 9,000 |
Plans other than 2018 Omnibus Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for issuances (in shares) |  | 0 |
CapitalMark Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for issuances (in shares) |  | 0 |
Shares acquired in period (in shares) | 858,000 |  |

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- Definition Remaining unrecognized share-based compensation expense on unvested restricted stock awards and units as of period end date. + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Acquisitions in Period + References No definition available. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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