Summarized financial information for the years ended December 31, 2016, 2015 and 2014, for the Company’s reportable segments is shown in the following tables:

Segment Data (dollar amounts in thousands)	Mobile Modular			TRS- RenTelco			Adler Tanks			Enviroplex ¹		Consolidated
Year Ended December 31,
2016
Rental revenues	$	130,496		$	82,307		$	58,585		$ —		$	271,388
Rental related services revenues		49,206			2,846			23,807		—			75,859
Sales and other revenues		29,810			23,464			1,438			22,121		76,833
Total revenues		209,512			108,617			83,830			22,121		424,080
Depreciation of rental equipment		21,001			35,256			15,940		—			72,197
Gross profit		93,816			45,797			37,409			7,145		184,167
Selling and administrative expenses		51,432			21,896			27,610			3,970		104,908
Income from operations		42,384			23,901			9,799			3,175		79,259
Interest expense (income) allocation		(6,804	)		(2,465	)		(3,200	)		262		(12,207	)
Income before provision for income taxes		35,580			21,315			6,599			3,437		66,931
Rental equipment acquisitions		43,099			30,505			1,030		—			74,634
Accounts receivable, net (period end)		55,916			19,506			16,150			5,305		96,877
Rental equipment, at cost (period end)		769,190			246,325			308,542		—			1,324,057
Rental equipment, net book value (period end)		544,421			90,172			221,778		—			856,371
Utilization (period end) ²		77.3	%		61.0	%		50.7	%
Average utilization ²		76.6	%		60.6	%		50.1	%

Segment Data (Continued) (dollar amounts in thousands)	Mobile Modular			TRS- RenTelco			Adler Tanks			Enviroplex ¹			Consolidated
Year Ended December 31,
2015
Rental revenues	$	115,986		$	89,208		$	68,502		$ —			$	273,696
Rental related services revenues		45,616			3,055			24,643		—				73,314
Sales and other revenues		22,682			22,754			1,486			10,612			57,534
Total revenues		184,284			115,017			94,631			10,612			404,544
Depreciation of rental equipment		19,246			39,974			15,993		—				75,213
Gross profit		78,771			47,836			47,397			2,903			176,907
Selling and administrative expenses		46,496			22,930			27,494			3,030			99,950
Income (loss) from operations		32,275			24,906			19,903			(127	)		76,957
Interest expense (income) allocation		(5,363	)		(2,194	)		(2,729	)		194			(10,092	)
Income before provision for income taxes		26,912			22,224			17,174			67			66,377
Rental equipment acquisitions		79,622			44,316			9,440		—				133,378
Accounts receivable, net (period end)		53,550			21,784			17,955			1,728			95,017
Rental equipment, at cost (period end)		736,875			262,945			310,263		—				1,310,083
Rental equipment, net book value (period end)		529,483			102,191			237,927		—				869,601
Utilization (period end) ²		76.9	%		58.7	%		49.7	%
Average utilization ²		75.8	%		60.5	%		58.3	%

2014
Rental revenues	$	96,457		$	99,020		$	74,098		$	—		$	269,575
Rental related services revenues		35,263			3,331			25,538			—			64,132
Sales and other revenues		29,855			25,951			1,152			17,457			74,415
Total revenues		161,575			128,302			100,788			17,457			408,122
Depreciation of rental equipment		16,536			40,935			15,207			—			72,678
Gross profit		63,455			60,249			53,452			5,063			182,219
Selling and administrative expenses		42,069			23,736			27,424			3,630			96,859
Income from operations		21,386			36,513			26,028			1,433			85,360
Interest expense (income) allocation		4,768			2,075			2,618			(181	)		9,280
Income before provision for income taxes		16,959			34,383			23,605			1,614			76,561
Rental equipment acquisitions		82,792			45,158			20,652			—			148,602
Accounts receivable, net (period end)		46,659			28,849			21,031			4,617			101,156
Rental equipment, at cost (period end)		664,340			261,995			303,303			—			1,229,638
Rental equipment, net book value (period end)		473,960			105,729			246,061			—			825,750
Utilization (period end) ²		75.0	%		59.8	%		63.9	%
Average utilization ²		72.3	%		60.4	%		62.9	%

1	Gross Enviroplex sales revenues were $22,206, $11,530 and $19,017 in 2016, 2015 and 2014, respectively, which includes inter-segment sales to Mobile Modular of $85, $918 and $1,560, which have been eliminated in consolidation.

2	Utilization is calculated each month by dividing the cost of rental equipment on rent by the total cost of rental equipment excluding new equipment inventory and accessory equipment. The average utilization for the period is calculated using the average costs of rental equipment.