2. Reporting Segments

Our homebuilding operations are engaged in the development, design, construction, marketing and sale of single-family attached and detached homes in 10 states, which are aggreated into four regions, each of which is managed by one of our regional presidents. Each of our homebuilding divisions is considered an operating segment, but has been aggregated into reportable segments defined by our regional structure as each region has similar economic characteristics and housing products. After our acquisition of UCP, Inc. management was reorganized to report to regional managers, who in turn report directly to our chief operating decision makers (which we refer to as “CODMs”), the Co-Chief Executive Officers of our Company. The CODMs review the results of our operations, including total revenue and income before income tax expense to determine profitability, at the regional level. Accordingly, we have broken our homebuilding operations into the following reportable segments based on the geographic markets in which we operate:

West (Southern California, Central Valley, Bay Area and Washington)

Mountain (Colorado, Nevada and Utah)

Texas (Houston, San Antonio and Austin)

Southeast (Georgia, North Carolina and Tennessee)

We have also identified our Financial Services operations, which provide mortgage and title services to our homebuyers as a fifth reportable segment. Our Corporate operations are a nonoperating segment, as it serves to support our homebuilding operations through functions, such as our executive, finance, treasury, human resources, and accounting departments. We have adjusted prior period segment information to conform to the current period presentation.

The following table summarizes total revenue and income before income tax expense by operating segment (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Revenue:
West	$	73,684	$	—	$	73,684	$	—
Mountain		157,224		141,043		443,526		353,649
Texas		36,757		30,036		111,997		106,179
Southeast		109,096		82,334		265,951		237,323
Financial Services		2,955		—		4,697		—
Corporate		—		—		—		—
Total revenue	$	379,716	$	253,413	$	899,855	$	697,151

Income (loss) before income tax expense:
West	$	5,259	$	—	$	5,259	$	—
Mountain		19,101		18,995		56,137		47,234
Texas		2,166		(288)		6,407		2,138
Southeast		6,001		7,848		16,609		21,827
Financial Services		505		—		(192)		—
Corporate		(17,876)		(6,824)		(33,904)		(19,942)
Total income before income tax expense	$	15,156	$	19,731	$	50,316	$	51,257

The following table summarizes total assets by operating segment (in thousands):


	September 30,		December 31,
	2017		2016
West	$	302,816	$	—
Mountain		571,124		541,657
Texas		186,840		138,392
Southeast		394,918		262,448
Financial Services		38,010		—
Corporate		137,300		65,031
Total assets	$	1,631,008	$	1,007,528

Corporate assets include certain cash and cash equivalents, our investment in unconsolidated subsidiaries, prepaid insurance, and deferred financing costs on our revolving line of credit.