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Segment Information | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Segment Information | (22) SEGMENT INFORMATION The Company evaluates its performance with an internal profitability measurement system that measures the profitability of its business units on a pre-tax basis. The four principal business units are metropolitan banks, community banks, other financial services and executive, operations and support. Metropolitan and community banks offer traditional banking products such as commercial and retail lending, and a full line of deposit accounts. Metropolitan banks consist of banking locations in the metropolitan Oklahoma City and Tulsa areas. Community banks consist of banking locations in communities throughout Oklahoma. Other financial services are specialty product business units including guaranteed small business lending, residential mortgage lending, trust services, securities brokerage, electronic banking and insurance. The executive, operations and support groups represent executive management, operational support and corporate functions that are not allocated to the other business units. The results of operations and selected financial information for the four business units are as follows:
|  | Metropolitan Banks |  |  | Community Banks |  |  | Other Financial Services |  |  | Executive, Operations & Support |  |  | Eliminations |  |  | Consolidated |
|  | (Dollars in thousands) |
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income (expense) |  | $ | 74,274 |  |  | $ | 147,731 |  |  | $ | 5,770 |  |  | $ | (636 | ) |  | $ | — |  |  | $ | 227,139 |
Provision for loan losses |  |  | 2,457 |  |  |  | 4,442 |  |  |  | 1,767 |  |  |  | (154 | ) |  |  | — |  |  |  | 8,512 |
Noninterest income |  |  | 15,698 |  |  |  | 54,353 |  |  |  | 37,842 |  |  |  | 97,368 |  |  |  | (87,191 | ) |  |  | 118,070 |
Depreciation and amortization |  |  | 2,192 |  |  |  | 7,790 |  |  |  | 584 |  |  |  | 1,225 |  |  |  | — |  |  |  | 11,791 |
Other expenses |  |  | 35,488 |  |  |  | 93,619 |  |  |  | 24,474 |  |  |  | 36,531 |  |  |  | (1,511 | ) |  |  | 188,601 |
Income before taxes |  | $ | 49,835 |  |  | $ | 96,233 |  |  | $ | 16,787 |  |  | $ | 59,130 |  |  | $ | (85,680 | ) |  | $ | 136,305 |
Total assets |  | $ | 2,552,024 |  |  | $ | 4,544,196 |  |  | $ | 117,332 |  |  | $ | 885,590 |  |  | $ | (845,986 | ) |  | $ | 7,253,156 |
Capital expenditures |  | $ | 3,606 |  |  | $ | 12,334 |  |  | $ | 64 |  |  | $ | 2,003 |  |  | $ | — |  |  | $ | 18,007 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income (expense) |  | $ | 63,519 |  |  | $ | 135,508 |  |  | $ | 6,132 |  |  | $ | (1,331 | ) |  | $ | — |  |  | $ | 203,828 |
Provision for loan losses |  |  | 2,229 |  |  |  | 7,509 |  |  |  | 1,653 |  |  |  | 128 |  |  |  | — |  |  |  | 11,519 |
Noninterest income |  |  | 16,372 |  |  |  | 57,745 |  |  |  | 29,711 |  |  |  | 75,415 |  |  |  | (72,211 | ) |  |  | 107,032 |
Depreciation and amortization |  |  | 2,341 |  |  |  | 8,281 |  |  |  | 510 |  |  |  | 1,251 |  |  |  | — |  |  |  | 12,383 |
Other expenses |  |  | 34,130 |  |  |  | 96,627 |  |  |  | 22,216 |  |  |  | 26,375 |  |  |  | (327 | ) |  |  | 179,021 |
Income before taxes |  | $ | 41,191 |  |  | $ | 80,836 |  |  | $ | 11,464 |  |  | $ | 46,330 |  |  | $ | (71,884 | ) |  | $ | 107,937 |
Total assets |  | $ | 2,493,096 |  |  | $ | 4,412,174 |  |  | $ | 83,594 |  |  | $ | 803,810 |  |  | $ | (773,722 | ) |  | $ | 7,018,952 |
Capital expenditures |  | $ | 1,525 |  |  | $ | 7,738 |  |  | $ | 125 |  |  | $ | 1,447 |  |  | $ | — |  |  | $ | 10,835 |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income (expense) |  | $ | 61,500 |  |  | $ | 122,404 |  |  | $ | 6,798 |  |  | $ | (1,910 | ) |  | $ | — |  |  | $ | 188,792 |
Provision for loan losses |  |  | 2,684 |  |  |  | 3,806 |  |  |  | 1,176 |  |  |  | 9 |  |  |  | — |  |  |  | 7,675 |
Noninterest income |  |  | 16,552 |  |  |  | 52,598 |  |  |  | 33,629 |  |  |  | 72,806 |  |  |  | (69,777 | ) |  |  | 105,808 |
Depreciation and amortization |  |  | 2,273 |  |  |  | 7,894 |  |  |  | 514 |  |  |  | 1,220 |  |  |  | — |  |  |  | 11,901 |
Other expenses |  |  | 32,942 |  |  |  | 91,655 |  |  |  | 22,308 |  |  |  | 27,221 |  |  |  | (312 | ) |  |  | 173,814 |
Income before taxes |  | $ | 40,153 |  |  | $ | 71,647 |  |  | $ | 16,429 |  |  | $ | 42,446 |  |  | $ | (69,465 | ) |  | $ | 101,210 |
Total assets |  | $ | 2,277,870 |  |  | $ | 4,379,205 |  |  | $ | 128,697 |  |  | $ | 624,428 |  |  | $ | (717,371 | ) |  | $ | 6,692,829 |
Capital expenditures |  | $ | 3,743 |  |  | $ | 4,634 |  |  | $ | 121 |  |  | $ | 2,765 |  |  | $ | — |  |  | $ | 11,263 |
The financial information for each business unit is presented on the basis used internally by management to evaluate performance and allocate resources. The Company utilizes a transfer pricing system to allocate the benefit or cost of funds provided or used by the various business units. Certain services provided by the support group to other business units, such as item processing, are allocated at rates approximating the cost of providing the services. Eliminations are adjustments to consolidate the business units and companies. Capital expenditures are generally charged to the business unit using the asset.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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