(10)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)
Three Months Ended September 30, 2018
Net interest income (expense)	$	21,313	$	42,773	$	1,241	$	346		$	—		$	65,673
Noninterest income		4,266		15,404		10,264		36,503			(33,636	)		32,801
Income before taxes		16,538		27,515		4,440		26,344			(32,919	)		41,918

Three Months Ended September 30, 2017
Net interest income (expense)	$	18,617	$	37,310	$	1,332	$	(26	)	$	—		$	57,233
Noninterest income		3,981		13,884		9,217		24,470			(22,383	)		29,169
Income before taxes		11,499		23,810		3,762		15,137			(21,682	)		32,526

Nine Months Ended September 30, 2018
Net interest income (expense)	$	62,701	$	126,223	$	4,074	$	590		$	—		$	193,588
Noninterest income		12,391		44,189		28,784		102,306			(94,322	)		93,348
Income before taxes		46,157		81,805		13,511		69,881			(92,659	)		118,695

Nine Months Ended September 30, 2017
Net interest income (expense)	$	54,969	$	109,480	$	4,525	$	(534	)	$	—		$	168,440
Noninterest income		11,748		40,821		24,983		74,586			(66,901	)		85,237
Income before taxes		36,357		71,038		10,526		47,368			(65,942	)		99,347

Total Assets:
September 30, 2018	$	2,724,502	$	4,841,853	$	80,411	$	945,221		$	(989,549	)	$	7,602,438
December 31, 2017		2,552,024		4,544,196		117,332		885,590			(845,986	)		7,253,156

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.