Segments

ASC 280, Segment Reporting (“ASC 280”) defines operating segments as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance.

The Company's operating segments consist of the Mid-Atlantic, Southeast, Texas, Intermountain, West and Mountain West divisions. Due to the similar economic characteristics, nature of products, distribution methods and customers, the Company has aggregated our operating segments into one reportable segment, "Geographic divisions."

In addition to our reportable segment, the Company's consolidated results include "Other reconciling items." Other reconciling items is comprised of our corporate activities.

The following tables present Net sales, Adjusted EBITDA and certain other performance measures for the reportable segment and total company operations for the periods indicated.



	Year Ended December 31, 2015									December 31, 2015
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA			Total Assets
Geographic divisions	$	1,576,746	$	361,410	$	23,726	$	122,914		$	1,305,545
Other reconciling items	—		—		863		(36,872		)	70,463
	$	1,576,746	$	361,410	$	24,589				$	1,376,008



	Year Ended December 31, 2014									December 31, 2014
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA			Total Assets
Geographic divisions	$	1,311,498	$	295,074	$	14,906	$	98,933		$	487,027
Other reconciling items	—		—		551		(21,664		)	101,485
	$	1,311,498	$	295,074	$	15,457				$	588,512



	Year Ended December 31, 2013									December 31, 2013
(in thousands)	Net Sales		Gross Profit		Depreciation & Amortization		Adjusted EBITDA			Total Assets
Geographic divisions	$	1,210,156	$	256,547	$	13,156	$	84,457		$	446,716
Other reconciling items	—		—		611		(19,706		)	21,556
	$	1,210,156	$	256,547	$	13,767				$	468,272

Reconciliation to consolidated financial statements:



	Year Ended December 31,
(in thousands)	2015			2014		2013
Income before income taxes	$	(14,520	)	$	28,455	$	27,928
Interest expense	27,552			27,090		18,786
Depreciation and amortization	24,589			15,457		13,767
Impairment of assets held for sale	—			134		73
Merger-related costs	22,993			—		—
Inventory step-up charges	10,285			—		—
Non-cash stock compensation expense	2,749			3,410		2,425
Headquarters relocation	3,865			2,054		—
Insurance deductible reserve adjustments and casualty fire loss	3,026			669		1,772
Loss portfolio transfer	2,826			—		—
Acquisition costs and other items	2,677			—		—
Adjusted EBITDA of other reconciling items	36,872			21,664		19,706
Adjusted EBITDA of geographic divisions reportable segment	$	122,914		$	98,933	$	84,457

The Company does not earn revenues or have long-lived assets located in foreign countries. In accordance with the enterprise-wide disclosure requirements of the accounting standard, the Company's net sales from external customers by main product lines are as follows for the years ended December 31, 2015, 2014 and 2013:



(in thousands)	2015		2014		2013
Structural components	$	249,371	$	205,036	$	190,626
Lumber & sheet goods	459,446		428,084		419,436
Millwork, doors & windows	442,675		328,063		278,704
Other building products & services	425,254		350,315		321,390
Total net sales	$	1,576,746	$	1,311,498	$	1,210,156