McGrath RentCorp (MGRC) 10-Q 30 Oct 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 29, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	MGRC
Entity Registrant Name	MCGRATH RENTCORP
Entity Central Index Key	752714
Current Fiscal Year End Date	-19
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		25,686,023

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUES
Rental	$65,941	$63,418	$189,585	$183,327
Rental Related Services	15,858	13,010	39,364	34,703
Rental Operations	81,799	76,428	228,949	218,030
Sales	26,515	22,382	54,186	42,318
Other	546	620	1,571	1,776
Total Revenues	108,860	99,430	284,706	262,124
Direct Costs of Rental Operations
Depreciation of Rental Equipment	17,233	16,163	50,461	47,236
Rental Related Services	11,278	10,252	29,591	27,816
Other	16,361	12,698	42,202	33,856
Total Direct Costs of Rental Operations	44,872	39,113	122,254	108,908
Costs of Sales	18,778	16,677	38,098	28,961
Total Costs of Revenues	63,650	55,790	160,352	137,869
Gross Profit	45,210	43,640	124,354	124,255
Selling and Administrative Expenses	22,383	20,848	65,813	63,372
Income from Operations	22,827	22,792	58,541	60,883
Interest Expense	2,148	2,312	6,508	6,867
Income Before Provision for Income Taxes	20,679	20,480	52,033	54,016
Provision for Income Taxes	8,106	8,029	20,397	21,175
Net Income	$12,573	$12,451	$31,636	$32,841
Earnings Per Share:
Basic	$0.49	$0.50	$1.25	$1.33
Diluted	$0.48	$0.50	$1.23	$1.31
Shares Used in Per Share Calculation:
Basic	25,649	24,785	25,338	24,730
Diluted	26,095	25,106	25,787	25,133
Cash Dividends Declared Per Share	$0.24	$0.24	$0.72	$0.71

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS
Cash	$651	$1,612
Accounts Receivable, net of allowance for doubtful accounts of $2,001 in 2013 and $3,000 in 2012	92,819	92,256
Rental Equipment, at cost:
Relocatable Modular Buildings	577,898	551,101
Electronic Test Equipment	270,164	266,934
Liquid and Solid Containment Tanks and Boxes	277,972	254,810
Rental Equipment, gross	1,126,034	1,072,845
Less Accumulated Depreciation	-372,224	-353,992
Rental Equipment, net	753,810	718,853
Property, Plant and Equipment, net	102,977	101,031
Prepaid Expenses and Other Assets	20,610	19,507
Intangible Assets, net	10,868	11,487
Goodwill	27,700	27,700
Total Assets	1,009,435	972,446
Liabilities:
Notes Payable	280,902	302,000
Accounts Payable and Accrued Liabilities	68,811	52,220
Deferred Income	27,143	26,924
Deferred Income Taxes, net	236,885	226,564
Total Liabilities	613,741	607,708
Shareholders' Equity:
Common Stock, no par value - Authorized - 40,000 shares Issued and Outstanding - 25,686 shares in 2013 and 24,931 shares in 2012	103,239	85,342
Retained Earnings	292,455	279,396
Total Shareholders' Equity	395,694	364,738
Total Liabilities and Shareholders' Equity	$1,009,435	$972,446

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$2,001	$3,000
Common Stock, par value
Common Stock, shares authorized	40,000	40,000
Common Stock, shares issued	25,686	24,931
Common Stock, shares outstanding	25,686	24,931

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$31,636	$32,841
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	57,097	53,665
Provision for Doubtful Accounts	1,347	1,775
Non-Cash Share-Based Compensation	3,382	3,154
Gain on Sale of Used Rental Equipment	-9,928	-9,381
Change In:
Accounts Receivable	-1,910	-10,152
Prepaid Expenses and Other Assets	-1,103	-10,729
Accounts Payable and Accrued Liabilities	8,855	3,580
Deferred Income	219	10,575
Deferred Income Taxes	10,321	15,680
Net Cash Provided by Operating Activities	99,916	91,008
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of Rental Equipment	-93,448	-106,219
Purchase of Property, Plant and Equipment	-7,962	-11,025
Proceeds from Sale of Used Rental Equipment	25,374	20,556
Net Cash Used in Investing Activities	-76,036	-96,688
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Borrowings (Repayments) Under Bank Lines of Credit	-21,098	17,693
Proceeds from the Exercise of Stock Options	13,170	3,572
Excess Tax Benefit from Exercise and Disqualifying Disposition of Stock Options	1,345	844
Payment of Dividends	-18,258	-17,296
Net Cash Provided by (Used in) Financing Activities	-24,841	4,813
Net Decrease in Cash	-961	-867
Cash Balance, beginning of period	1,612	1,229
Cash Balance, end of period	651	362
Interest Paid, during the period	5,607	5,854
Net Income Taxes Paid, during the period	7,930	4,633
Dividends Accrued, during the period, not yet paid	6,370	6,156
Rental Equipment Acquisitions, not yet paid	$7,367	$6,868

Condensed_Consolidated_Financi

Condensed Consolidated Financial Information	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]
Condensed Consolidated Financial Information	NOTE 1. CONDENSED CONSOLIDATED FINANCIAL INFORMATION
	The condensed consolidated financial statements for the three and nine months ended September 30, 2013 and 2012 have not been audited, but in the opinion of management, all adjustments (consisting of normal recurring accruals, consolidating and eliminating entries) necessary for the fair presentation of the consolidated financial positions, results of operations and cash flows of McGrath RentCorp (the “Company”) have been made. The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and note disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to those rules and regulations. The consolidated results for the nine months ended September 30, 2013 should not be considered as necessarily indicative of the consolidated results for the entire fiscal year. These condensed consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s latest Annual Report on Form 10-K filed with the SEC on February 22, 2013 for the year ended December 31, 2012 (the “2012 Annual Report”).
	Comprehensive income is equivalent to net income for all periods presented.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 2. EARNINGS PER SHARE
	Basic earnings per share (“EPS”) is computed as net income divided by the weighted-average number of shares of common stock outstanding for the period. Diluted EPS is computed assuming conversion of all potentially dilutive securities including the dilutive effect of stock options, unvested restricted stock awards and other potentially dilutive securities. The table below presents the weighted-average number of shares of common stock used to calculate basic and diluted earnings per share:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in thousands)	2013		2012		2013		2012
	Weighted-average number of shares of common stock for calculating basic earnings per share		25,649		24,785		25,338		24,730
	Effect of potentially dilutive securities from equity-based compensation		446		321		449		403
	Weighted-average number of shares of common stock for calculating diluted earnings per share		26,095		25,106		25,787		25,133
	The following securities were not included in the computation of diluted earnings per share as their effect would have been anti-dilutive:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in thousands)	2013		2012		2013		2012
	Options to purchase shares of common stock		—		1,203		41		1,049

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 3. RELATED PARTY TRANSACTIONS
	The Company acquired liquid and solid containment tanks totaling $4.4 million and $10.3 million during the three months ended September 30, 2013 and 2012, respectively, and $13.6 million and $32.1 million during the nine months ended September 30, 2013 and 2012, respectively, from Sabre Manufacturing, LLC (“Sabre”), which was controlled by the President of Adler Tank Rentals, LLC, a wholly-owned subsidiary of the Company, until August 16, 2013 when Sabre was sold to an unrelated party. In addition, the Company received certain support services from Sabre, which were insignificant in the three and nine months ended September 30, 2013 and 2012. Amounts due to Sabre at September 30, 2013 and 2012 were $0.4 million and $1.0 million, respectively.

Intangible_Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE 4. INTANGIBLE ASSETS
	Intangible assets consist of the following:
	(dollar amounts in thousands)	Estimated	September 30,			December 31,
		Useful Life
		In Years	2013			2012
	Trade Name	Indefinite	$	5,700		$	5,700
	Customer Relationships	11		9,100			9,100
				14,800			14,800
	Less Accumulated Amortization			(3,932	)		(3,313	)
			$	10,868		$	11,487
	The Company assesses potential impairment of its goodwill and intangible assets when there is evidence that events or circumstances have occurred that would indicate the recovery of an asset’s carrying value is unlikely. The Company also assesses potential impairment of its goodwill and identifiable indefinite-lived intangible assets on an annual basis regardless of whether there is evidence of impairment. If indicators of impairment were to be present in intangible assets used in operations and future discounted cash flows were not expected to be sufficient to recover the assets’ carrying amount, an impairment loss would be charged to expense in the period identified. The amount of an impairment loss that would be recognized is the excess of the asset’s carrying value over its fair value. Factors the Company considers important, which may cause impairment include, among others, significant changes in the manner of use of the acquired asset, negative industry or economic trends, and significant underperformance relative to historical or projected operating results.
	The Company typically conducts its annual impairment analysis in the fourth quarter of its fiscal year. The impairment analysis did not result in an impairment charge for the fiscal year ended December 31, 2012. Determining the fair value of a reporting unit requires judgment and involves the use of significant estimates and assumptions. The Company based its fair value estimates on assumptions that it believes are reasonable but are uncertain and subject to changes in market conditions.
	Intangible assets with finite useful lives are amortized over their respective useful lives. Based on the carrying values at September 30, 2013 and assuming no subsequent impairment of the underlying assets, the amortization expense is expected to be $0.2 million for the remainder of fiscal year 2013 and $0.8 million in each of the fiscal years 2014 through 2018.

Segment_Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Segment Reporting	NOTE 5. SEGMENT REPORTING
	The Company’s four reportable segments are (1) its modular building rental division (“Mobile Modular”); (2) its electronic test equipment rental division (“TRS-RenTelco”); (3) its containment solutions for the storage of hazardous and non-hazardous liquids and solids division (“Adler Tanks”); and (4) its classroom manufacturing division selling modular buildings used primarily as classrooms in California (“Enviroplex”). The operations of each of these segments are described in Part I – Item 1, “Business,” and the accounting policies of the segments are described in “Note 2 – Significant Accounting Policies” in the Company’s annual report on Form 10-K for the year ended December 31, 2012. Management focuses on several key measures to evaluate and assess each segment’s performance, including rental revenue growth, gross profit, income from operations and income before provision for income taxes. Excluding interest expense, allocations of revenue and expense not directly associated with one of these segments are generally allocated to Mobile Modular, TRS-RenTelco and Adler Tanks based on their pro-rata share of direct revenues. Interest expense is allocated among Mobile Modular, TRS-RenTelco and Adler Tanks based on their pro-rata share of average rental equipment at cost, intangible assets, accounts receivable, deferred income and customer security deposits. The Company does not report total assets by business segment. Summarized financial information for the nine months ended September 30, 2013 and 2012 for the Company’s reportable segments is shown in the following table:
	(dollar amounts in thousands)		Mobile			TRS-			Adler Tanks			Enviroplex 1			Consolidated
			Modular			RenTelco
	Nine Months Ended September 30,
	2013
	Rental Revenues		$	60,367		$	75,897		$	53,321		$	—		$	189,585
	Rental Related Services Revenues			21,009			2,285			16,070			—			39,364
	Sales and Other Revenues			16,806			21,516			1,509			15,926			55,757
	Total Revenues			98,182			99,698			70,900			15,926			284,706
	Depreciation of Rental Equipment			10,740			29,538			10,183			—			50,461
	Gross Profit			34,881			46,225			39,442			3,806			124,354
	Selling and Administrative Expenses			26,809			18,123			18,475			2,406			65,813
	Income from Operations			8,072			28,102			20,967			1,400			58,541
	Interest Expense (Income) Allocation			3,238			1,619			1,799			(148	)		6,508
	Income before Provision for Income Taxes			4,834			26,483			19,168			1,548			52,033
	Rental Equipment Acquisitions			36,463			40,444			24,504			—			101,411
	Accounts Receivable, net (period end)			41,818			24,454			23,792			2,755			92,819
	Rental Equipment, at cost (period end)			577,898			270,164			277,972			—			1,126,034
	Rental Equipment, net book value (period end)			404,045			110,657			239,108			—			753,810
	Utilization (period end) 2			70.4	%		62.3	%		64.6	%
	Average Utilization 2			67.6	%		63.3	%		65.7	%
	2012
	Rental Revenues		$	59,414		$	74,796		$	49,117		$	—		$	183,327
	Rental Related Services Revenues			19,427			2,831			12,445			—			34,703
	Sales and Other Revenues			10,294			17,401			2,493			13,906			44,094
	Total Revenues			89,135			95,028			64,055			13,906			262,124
	Depreciation of Rental Equipment			10,437			28,280			8,519			—			47,236
	Gross Profit			37,659			45,202			38,552			2,842			124,255
	Selling and Administrative Expenses			25,317			19,315			15,347			3,393			63,372
	Income (Loss) from Operations			12,342			25,887			23,205			(551	)		60,883
	Interest Expense (Income) Allocation			3,432			1,800			1,734			(99	)		6,867
	Income (Loss) before Provision for Income Taxes			8,910			24,087			21,471			(452	)		54,016
	Rental Equipment Acquisitions			16,787			41,082			47,288			—			105,157
	Accounts Receivable, net (period end)			46,939			22,278			23,036			8,795			101,048
	Rental Equipment, at cost (period end)			549,225			274,300			246,228			—			1,069,753
	Rental Equipment, net book value (period end)			385,430			113,574			220,632			—			719,636
	Utilization (period end) 2			66.6	%		64.2	%		69.4	%
	Average Utilization 2			66.3	%		65.8	%		72	%
	1	Gross Enviroplex sales revenues were $15,930 and $14,320 for the nine months ended September 30, 2013 and 2012, respectively, which includes inter-segment sales to Mobile Modular of $4 and $414, respectively, 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 accessory equipment and for Mobile Modular and Adler Tanks excluding new equipment inventory. The Average Utilization for the period is calculated using the average costs of rental equipment.
	No single customer accounted for more than 10% of total revenues for the nine months ended September 30, 2013 and 2012. Revenues from foreign country customers accounted for 6% and 10% of the Company’s total revenues, respectively, for the same periods.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]
Weighted-Average Number of Shares of Common Stock Used to Calculate Basic and Diluted Earnings Per Share	The table below presents the weighted-average number of shares of common stock used to calculate basic and diluted earnings per share:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in thousands)	2013		2012		2013		2012
	Weighted-average number of shares of common stock for calculating basic earnings per share		25,649		24,785		25,338		24,730
	Effect of potentially dilutive securities from equity-based compensation		446		321		449		403
	Weighted-average number of shares of common stock for calculating diluted earnings per share		26,095		25,106		25,787		25,133
Securities Not Included in Computation of Diluted Earnings Per Share	The following securities were not included in the computation of diluted earnings per share as their effect would have been anti-dilutive:
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	(in thousands)	2013		2012		2013		2012
	Options to purchase shares of common stock		—		1,203		41		1,049

Intangible_Assets_Tables

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	Intangible assets consist of the following:
	(dollar amounts in thousands)	Estimated	September 30,			December 31,
		Useful Life
		In Years	2013			2012
	Trade Name	Indefinite	$	5,700		$	5,700
	Customer Relationships	11		9,100			9,100
				14,800			14,800
	Less Accumulated Amortization			(3,932	)		(3,313	)
			$	10,868		$	11,487

Segment_Reporting_Tables

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Summarized Financial Information for Company's Reportable Segments	Summarized financial information for the nine months ended September 30, 2013 and 2012 for the Company’s reportable segments is shown in the following table:
	(dollar amounts in thousands)		Mobile			TRS-			Adler Tanks			Enviroplex 1			Consolidated
			Modular			RenTelco
	Nine Months Ended September 30,
	2013
	Rental Revenues		$	60,367		$	75,897		$	53,321		$	—		$	189,585
	Rental Related Services Revenues			21,009			2,285			16,070			—			39,364
	Sales and Other Revenues			16,806			21,516			1,509			15,926			55,757
	Total Revenues			98,182			99,698			70,900			15,926			284,706
	Depreciation of Rental Equipment			10,740			29,538			10,183			—			50,461
	Gross Profit			34,881			46,225			39,442			3,806			124,354
	Selling and Administrative Expenses			26,809			18,123			18,475			2,406			65,813
	Income from Operations			8,072			28,102			20,967			1,400			58,541
	Interest Expense (Income) Allocation			3,238			1,619			1,799			(148	)		6,508
	Income before Provision for Income Taxes			4,834			26,483			19,168			1,548			52,033
	Rental Equipment Acquisitions			36,463			40,444			24,504			—			101,411
	Accounts Receivable, net (period end)			41,818			24,454			23,792			2,755			92,819
	Rental Equipment, at cost (period end)			577,898			270,164			277,972			—			1,126,034
	Rental Equipment, net book value (period end)			404,045			110,657			239,108			—			753,810
	Utilization (period end) 2			70.4	%		62.3	%		64.6	%
	Average Utilization 2			67.6	%		63.3	%		65.7	%
	2012
	Rental Revenues		$	59,414		$	74,796		$	49,117		$	—		$	183,327
	Rental Related Services Revenues			19,427			2,831			12,445			—			34,703
	Sales and Other Revenues			10,294			17,401			2,493			13,906			44,094
	Total Revenues			89,135			95,028			64,055			13,906			262,124
	Depreciation of Rental Equipment			10,437			28,280			8,519			—			47,236
	Gross Profit			37,659			45,202			38,552			2,842			124,255
	Selling and Administrative Expenses			25,317			19,315			15,347			3,393			63,372
	Income (Loss) from Operations			12,342			25,887			23,205			(551	)		60,883
	Interest Expense (Income) Allocation			3,432			1,800			1,734			(99	)		6,867
	Income (Loss) before Provision for Income Taxes			8,910			24,087			21,471			(452	)		54,016
	Rental Equipment Acquisitions			16,787			41,082			47,288			—			105,157
	Accounts Receivable, net (period end)			46,939			22,278			23,036			8,795			101,048
	Rental Equipment, at cost (period end)			549,225			274,300			246,228			—			1,069,753
	Rental Equipment, net book value (period end)			385,430			113,574			220,632			—			719,636
	Utilization (period end) 2			66.6	%		64.2	%		69.4	%
	Average Utilization 2			66.3	%		65.8	%		72	%
	1	Gross Enviroplex sales revenues were $15,930 and $14,320 for the nine months ended September 30, 2013 and 2012, respectively, which includes inter-segment sales to Mobile Modular of $4 and $414, respectively, 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 accessory equipment and for Mobile Modular and Adler Tanks excluding new equipment inventory. The Average Utilization for the period is calculated using the average costs of rental equipment.

Earnings_Per_Share_WeightedAve

Earnings Per Share - Weighted-Average Number of Shares of Common Stock Used to Calculate Basic and Diluted Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Weighted-average number of shares of common stock for calculating basic earnings per share	25,649	24,785	25,338	24,730
Effect of potentially dilutive securities from equity-based compensation	446	321	449	403
Weighted-average number of shares of common stock for calculating diluted earnings per share	26,095	25,106	25,787	25,133

Earnings_Per_Share_Securities_

Earnings Per Share - Securities Not Included in the Computation of Diluted Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Options to purchase shares of common stock	0	1,203	41	1,049

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Related Party Transactions [Abstract]
Acquisition of liquid and solid containment tanks	$4.40	$10.30	$13.60	$32.10
Amounts due to Sabre Manufacturing, LLC	$0.40	$1	$0.40	$1

Intangible_Assets_Summary_of_I

Intangible Assets - Summary of Intangible Assets (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Trade Name	$5,700	$5,700
Customer Relationships	9,100	9,100
Intangible Assets, Gross	14,800	14,800
Less Accumulated Amortization	-3,932	-3,313
Intangible Assets, net	$10,868	$11,487
Estimated Useful Life in Years	11 years

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Subsequent impairment of the underlying assets	$0
Expected amortization expense for 2013	0.2
Expected amortization expense for 2014	0.8
Expected amortization expense for 2015	0.8
Expected amortization expense for 2016	0.8
Expected amortization expense for 2017	0.8
Expected amortization expense for 2018	$0.80

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Number of reportable segments	4
Sales [Member]
Segment Reporting Information [Line Items]
Revenues from customers	10.00%	10.00%
Sales [Member] | Foreign country customers [Member]
Segment Reporting Information [Line Items]
Revenues from customers	6.00%	10.00%

Segment_Reporting_Summarized_F

Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Rental Revenues	$65,941	$63,418	$189,585	$183,327
Rental Related Services Revenues	15,858	13,010	39,364	34,703
Sales and Other Revenues			55,757	44,094
Total Revenues	108,860	99,430	284,706	262,124
Depreciation of Rental Equipment	17,233	16,163	50,461	47,236
Gross Profit	45,210	43,640	124,354	124,255
Selling and Administrative Expenses	22,383	20,848	65,813	63,372
Income (Loss) from Operations	22,827	22,792	58,541	60,883
Interest Expense (Income) Allocation	2,148	2,312	6,508	6,867
Income (Loss) before Provision for Income Taxes	20,679	20,480	52,033	54,016
Rental Equipment Acquisitions			101,411	105,157
Accounts Receivable, net (period end)	92,819	101,048	92,819	101,048	92,256
Rental Equipment, at cost (period end)	1,126,034	1,069,753	1,126,034	1,069,753	1,072,845
Rental Equipment, net book value (period end)	753,810	719,636	753,810	719,636	718,853
Operating Segments [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Rental Revenues			60,367	59,414
Rental Related Services Revenues			21,009	19,427
Sales and Other Revenues			16,806	10,294
Total Revenues			98,182	89,135
Depreciation of Rental Equipment			10,740	10,437
Gross Profit			34,881	37,659
Selling and Administrative Expenses			26,809	25,317
Income (Loss) from Operations			8,072	12,342
Interest Expense (Income) Allocation			3,238	3,432
Income (Loss) before Provision for Income Taxes			4,834	8,910
Rental Equipment Acquisitions			36,463	16,787
Accounts Receivable, net (period end)	41,818	46,939	41,818	46,939
Rental Equipment, at cost (period end)	577,898	549,225	577,898	549,225
Rental Equipment, net book value (period end)	404,045	385,430	404,045	385,430
Utilization (period end)			70.40%	66.60%
Average Utilization			67.60%	66.30%
Operating Segments [Member] | TRS-RenTelco [Member]
Segment Reporting Information [Line Items]
Rental Revenues			75,897	74,796
Rental Related Services Revenues			2,285	2,831
Sales and Other Revenues			21,516	17,401
Total Revenues			99,698	95,028
Depreciation of Rental Equipment			29,538	28,280
Gross Profit			46,225	45,202
Selling and Administrative Expenses			18,123	19,315
Income (Loss) from Operations			28,102	25,887
Interest Expense (Income) Allocation			1,619	1,800
Income (Loss) before Provision for Income Taxes			26,483	24,087
Rental Equipment Acquisitions			40,444	41,082
Accounts Receivable, net (period end)	24,454	22,278	24,454	22,278
Rental Equipment, at cost (period end)	270,164	274,300	270,164	274,300
Rental Equipment, net book value (period end)	110,657	113,574	110,657	113,574
Utilization (period end)			62.30%	64.20%
Average Utilization			63.30%	65.80%
Operating Segments [Member] | Adler Tanks [Member]
Segment Reporting Information [Line Items]
Rental Revenues			53,321	49,117
Rental Related Services Revenues			16,070	12,445
Sales and Other Revenues			1,509	2,493
Total Revenues			70,900	64,055
Depreciation of Rental Equipment			10,183	8,519
Gross Profit			39,442	38,552
Selling and Administrative Expenses			18,475	15,347
Income (Loss) from Operations			20,967	23,205
Interest Expense (Income) Allocation			1,799	1,734
Income (Loss) before Provision for Income Taxes			19,168	21,471
Rental Equipment Acquisitions			24,504	47,288
Accounts Receivable, net (period end)	23,792	23,036	23,792	23,036
Rental Equipment, at cost (period end)	277,972	246,228	277,972	246,228
Rental Equipment, net book value (period end)	239,108	220,632	239,108	220,632
Utilization (period end)			64.60%	69.40%
Average Utilization			65.70%	72.00%
Operating Segments [Member] | Enviroplex [Member]
Segment Reporting Information [Line Items]
Rental Revenues
Rental Related Services Revenues
Sales and Other Revenues			15,926	13,906
Total Revenues			15,926	13,906
Depreciation of Rental Equipment
Gross Profit			3,806	2,842
Selling and Administrative Expenses			2,406	3,393
Income (Loss) from Operations			1,400	-551
Interest Expense (Income) Allocation			-148	-99
Income (Loss) before Provision for Income Taxes			1,548	-452
Rental Equipment Acquisitions
Accounts Receivable, net (period end)	2,755	8,795	2,755	8,795
Rental Equipment, at cost (period end)
Rental Equipment, net book value (period end)

Segment_Reporting_Summarized_F1

Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Mobile Modular [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales revenues	$4	$414
Enviroplex [Member]
Segment Reporting Information [Line Items]
Sales revenues	$15,930	$14,320