Segments

Certain financial information on a segment basis is as follows (in thousands):



Year Ended December 31,	2017			2016			2015
Revenues:
Domestic	$	3,845,830		$	3,381,715		$	3,038,883
Import	4,432,760			3,764,255			3,330,949
Luxury	1,810,085			1,528,760			1,490,632
	10,088,675			8,674,730			7,860,464
Corporate and other	(2,165		)	3,427			3,788
	$	10,086,510		$	8,678,157		$	7,864,252

Segment income*:
Domestic	$	105,208		$	106,210		$	115,145
Import	117,776			110,204			98,751
Luxury	37,022			31,467			36,391
	260,006			247,881			250,287
Corporate and other	167,366			114,321			74,514
Depreciation and amortization	(57,722		)	(49,369		)	(41,600		)
Other interest expense	(34,776		)	(23,207		)	(19,491		)
Other (expense) income, net	12,195			(6,103		)	(1,006		)
Income before income taxes	$	347,069		$	283,523		$	262,704

*Segment income for each of the segments is defined as Income from operations before income taxes, depreciation and amortization, other interest expense and other (expense) income, net.



Year Ended December 31,	2017			2016			2015
Floor plan interest expense:
Domestic	$	37,196		$	26,445		$	21,061
Import	29,009			18,665			14,959
Luxury	15,756			10,999			9,096
	81,961			56,109			45,116
Corporate and other	(42,625		)	(30,578		)	(25,582		)
	$	39,336		$	25,531		$	19,534



December 31,	2017		2016
Total assets:
Domestic	$	1,338,232	$	1,225,387
Import	1,137,934		959,355
Luxury	641,118		511,779
Corporate and other	1,565,782		1,147,629
	$	4,683,066	$	3,844,150