McGrath RentCorp (MGRC) 10-K 25 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 24, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	MGRC
Entity Registrant Name	MCGRATH RENTCORP
Entity Central Index Key	752,714
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		23,852,351
Entity Public Float			$ 774,364,686

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash	$ 1,103	$ 1,167
Accounts receivable, net of allowance for doubtful accounts of $2,087 in 2015 and $2,038 in 2014	95,263	101,294
Income taxes receivable	11,000
Rental equipment, at cost:
Relocatable modular buildings	736,875	664,340
Electronic test equipment	262,945	261,995
Liquid and solid containment tanks and boxes	310,263	303,303
Rental equipment, gross	1,310,083	1,229,638
Less accumulated depreciation	(440,482)	(403,888)
Rental equipment, net	869,601	825,750
Property, plant and equipment, net	109,753	108,628
Prepaid expenses and other assets	28,716	41,424
Intangible assets, net	9,465	10,336
Goodwill	27,808	27,808
Total assets	1,152,709	1,116,407
Liabilities:
Notes payable	381,441	322,478
Accounts payable and accrued liabilities	71,942	71,357
Deferred income	36,288	29,139
Deferred income taxes, net	283,351	268,902
Total liabilities	$ 773,022	$ 691,876
Commitments and contingencies (Note 7)
Shareholders’ equity:
Common stock, no par value — authorized 40,000 shares Issued and outstanding — 23,851 shares as of December 31, 2015 and 26,051 shares as of December 31, 2014	$ 101,046	$ 106,469
Retained earnings	278,708	318,164
Accumulated other comprehensive loss	(67)	(102)
Total shareholders’ equity	379,687	424,531
Total liabilities and shareholders’ equity	$ 1,152,709	$ 1,116,407

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,087	$ 2,038
Common stock, par value
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	23,851,000	26,051,000
Common Stock, shares outstanding	23,851,000	26,051,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Rental	$ 273,696	$ 269,575	$ 255,766
Rental related services	73,314	64,132	53,148
Rental operations	347,010	333,707	308,914
Sales	55,385	72,248	68,443
Other	2,149	2,167	2,152
Total revenues	404,544	408,122	379,509
Direct costs of rental operations
Depreciation of rental equipment	75,213	72,678	68,208
Rental related services	54,719	48,849	40,189
Other	60,936	56,946	55,017
Total direct costs of rental operations	190,868	178,473	163,414
Cost of sales	36,769	47,430	47,080
Total costs of revenues	227,637	225,903	210,494
Gross profit	176,907	182,219	169,015
Selling and administrative expenses	99,950	96,859	88,765
Income from operations	76,957	85,360	80,250
Other income (expense):
Interest expense	(10,092)	(9,280)	(8,687)
Gain on sale of property, plant and equipment		812
Foreign currency exchange loss	(488)	(331)	(189)
Income before provision for income taxes	66,377	76,561	71,374
Provision for income taxes	25,907	30,852	27,977
Net income	$ 40,470	$ 45,709	$ 43,397
Earnings per share:
Basic	$ 1.60	$ 1.77	$ 1.71
Diluted	$ 1.59	$ 1.75	$ 1.67
Shares used in per share calculations:
Basic	25,369	25,914	25,433
Diluted	25,457	26,175	25,926
Cash dividends declared per share	$ 1	$ 0.98	$ 0.96

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 40,470	$ 45,709	$ 43,397
Other comprehensive income (loss):
Foreign currency translation adjustment	55	(82)	(37)
Tax benefit (provision)	(20)	11	6
Comprehensive income	$ 40,505	$ 45,638	$ 43,366

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2012	$ 364,738	$ 85,342	$ 279,396
Balance, Shares at Dec. 31, 2012		24,931,000
Net income	43,397		43,397
Share-based compensation	3,680	$ 3,680
Common stock issued under stock plans, net of shares withheld for employee taxes	15,067	$ 15,067
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		826,000
Excess tax benefit (shortfall) from equity awards	1,329	$ 1,329
Taxes paid related to net share settlement of stock awards	(2,395)	(2,395)
Dividends accrued of $0.96, $0.98, $1.00 per share in 2013,2014 and 2015	(24,755)		(24,755)
Other comprehensive (loss) gain	(31)			$ (31)
Balance at Dec. 31, 2013	401,030	$ 103,023	298,038	(31)
Balance, Shares at Dec. 31, 2013		25,757,000
Net income	7,871
Balance at Mar. 31, 2014	401,563
Balance at Dec. 31, 2013	401,030	$ 103,023	298,038	(31)
Balance, Shares at Dec. 31, 2013		25,757,000
Net income	45,709		45,709
Share-based compensation	3,854	$ 3,854
Common stock issued under stock plans, net of shares withheld for employee taxes	$ 1,729	$ 1,729
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		294,000
Common stock repurchased, Shares	0
Excess tax benefit (shortfall) from equity awards	$ 1,822	$ 1,822
Taxes paid related to net share settlement of stock awards	(3,959)	(3,959)
Dividends accrued of $0.96, $0.98, $1.00 per share in 2013,2014 and 2015	(25,583)		(25,583)
Other comprehensive (loss) gain	(71)			(71)
Balance at Dec. 31, 2014	$ 424,531	$ 106,469	318,164	(102)
Balance, Shares at Dec. 31, 2014	26,051,000	26,051,000
Balance at Mar. 31, 2014	$ 401,563
Net income	10,205
Balance at Jun. 30, 2014	406,439
Net income	13,746
Balance at Sep. 30, 2014	414,519
Net income	13,887
Balance at Dec. 31, 2014	$ 424,531	$ 106,469	318,164	(102)
Balance, Shares at Dec. 31, 2014	26,051,000	26,051,000
Net income	$ 6,846
Balance at Mar. 31, 2015	425,848
Balance at Dec. 31, 2014	$ 424,531	$ 106,469	318,164	(102)
Balance, Shares at Dec. 31, 2014	26,051,000	26,051,000
Net income	$ 40,470		40,470
Share-based compensation	3,399	$ 3,399
Common stock issued under stock plans, net of shares withheld for employee taxes	2,149	$ 2,149
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		208,000
Common stock repurchased	$ (63,953)	$ (9,119)	(54,834)
Common stock repurchased, Shares	(2,407,974)	(2,408,000)
Excess tax benefit (shortfall) from equity awards	$ (292)	$ (292)
Taxes paid related to net share settlement of stock awards	(1,560)	(1,560)
Dividends accrued of $0.96, $0.98, $1.00 per share in 2013,2014 and 2015	(25,092)		(25,092)
Other comprehensive (loss) gain	35			35
Balance at Dec. 31, 2015	$ 379,687	$ 101,046	278,708	(67)
Balance, Shares at Dec. 31, 2015	23,851,000	23,851,000
Balance at Mar. 31, 2015	$ 425,848
Net income	8,490
Balance at Jun. 30, 2015	426,823
Net income	13,616
Balance at Sep. 30, 2015	389,464
Net income	11,518
Balance at Dec. 31, 2015	$ 379,687	$ 101,046	$ 278,708	$ (67)
Balance, Shares at Dec. 31, 2015	23,851,000	23,851,000

Consolidated Statements of Sha7

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Dividends accrued per share	$ 1	$ 0.98	$ 0.96
Retained Earnings [Member]
Dividends accrued per share	$ 1	$ 0.98	$ 0.96

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Cash Flows from Operating Activities:
Net income	$ 40,470	$ 45,709	$ 43,397
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	84,280	81,125	76,849
Provision for doubtful accounts	2,149	1,825	2,144
Share-based compensation	3,399	3,854	3,680
Gain on sale of used rental equipment	(11,902)	(15,368)	(13,091)
Gain on sale of property, plant and equipment		(812)
Foreign currency exchange loss	488	331	189
Change in:
Accounts receivable	3,882	(15,469)	2,462
Income taxes receivable	(11,000)
Prepaid expenses and other assets	12,708	(13,652)	(8,265)
Accounts payable and accrued liabilities	(1,520)	10,662	6,506
Deferred income	7,149	5,136	(2,921)
Deferred income taxes	14,449	19,645	22,693
Net cash provided by operating activities	144,552	122,986	133,643
Cash Flows from Investing Activities:
Purchases of rental equipment	(131,037)	(152,197)	(132,611)
Purchases of property, plant and equipment	(9,321)	(12,740)	(11,973)
Proceeds from sale of used rental equipment	26,214	32,556	33,380
Proceeds from sale of property, plant and equipment		2,501
Net cash used in investing activities	(114,144)	(129,880)	(111,204)
Cash Flows from Financing Activities:
Net borrowings (repayments) under bank lines of credit	18,963	12,475	(11,997)
Principal payments on Series A senior notes	(20,000)	(20,000)
Proceeds from the exercise of stock options	2,149	1,729	15,067
Excess tax benefit (shortfall) from exercise of stock options	(292)	1,822	1,329
Taxes paid related to net share settlement of stock awards	(1,560)	(3,959)	(2,395)
Repurchase of common stock	(63,953)
Payment of dividends	(25,779)	(25,551)	(24,423)
Net cash provided by (used in) financing activities	(30,472)	6,516	(22,419)
Effect of foreign currency exchange rate changes on cash		(85)	(2)
Net increase (decrease) in cash	(64)	(463)	18
Cash balance, beginning of period	1,167	1,630	1,612
Cash balance, end of period	1,103	1,167	1,630
Supplemental Disclosure of Cash Flow Information:
Interest paid, during the period	10,041	9,074	8,813
Net income taxes paid, during the period	2,498	22,275	11,074
Dividends accrued during the period, not yet paid	6,019	6,526	6,373
Rental equipment acquisitions, not yet paid	7,280	4,942	$ 8,533
Series B Senior Notes
Cash Flows from Financing Activities:
Borrowings		$ 40,000
Series C Senior Notes
Cash Flows from Financing Activities:
Borrowings	$ 60,000

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization McGrath RentCorp and its wholly-owned subsidiaries (the “Company”) is a California corporation organized in 1979. The Company is a diversified business to business rental company with four rental divisions; relocatable modular buildings, portable storage containers, electronic test equipment and liquid and solid containment tanks and boxes. Although the Company’s primary emphasis is on equipment rentals, sales of equipment occur in the normal course of business. The Company is comprised of four reportable business segments: modular building and portable storage segment (“Mobile Modular”), electronic test equipment segment (“TRS-RenTelco”), containment solutions for the storage of hazardous and non-hazardous liquids and solids segment (“Adler Tanks”) and classroom manufacturing division selling modular classrooms in California (“Enviroplex”). Principles of Consolidation The consolidated financial statements include the accounts of McGrath RentCorp and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Revenue Recognition Rental revenue from operating leases is recognized on a straight-line basis over the term of the lease. Rental billings for periods extending beyond period end are recorded as deferred income and are recognized when earned. Rental related services revenue is primarily associated with relocatable modular building and liquid and solid containment tanks and boxes leases. For modular building leases, rental related services revenue consists of billings to customers for modifications, delivery, installation, additional site-related work, and dismantle and return delivery. For modular building leases, revenue related to delivery, installation, dismantle and return delivery are an integral part of the negotiated lease agreement with customers and are recognized on a straight-line basis over the term of the lease. For liquid and solid containment solutions, rental related services revenue consists of billings for delivery, removal and cleaning of the tanks and boxes. These revenues are recognized in the period performed. Sales revenue is recognized upon delivery and installation of the equipment to customers. Certain leases are accounted for as sales-type leases. For these leases, sales revenue and the related accounts receivable are recognized upon delivery and installation of the equipment and the unearned interest is recognized over the lease term on a basis which results in a constant rate of return on the unrecovered lease investment. Other revenue is recognized when earned and primarily includes interest income on sales-type leases, rental income on facility rentals and certain logistics services. Sales taxes charged to customers are reported on a net basis and are excluded from revenues and expenses. Depreciation of Rental Equipment Rental equipment is depreciated on a straight-line basis for financial reporting purposes and on an accelerated basis for income tax purposes. The costs of major refurbishment of relocatable modular buildings and portable storage containers are capitalized to the extent the refurbishment significantly adds value to, or extends the life of the equipment. Maintenance and repairs are expensed as incurred. The estimated useful lives and residual values of the Company’s rental equipment used for financial reporting purposes are as follows: Relocatable modular buildings 18 years, 50% residual value Relocatable modular accessories 3 to 18 years, no residual value Portable storage containers 25 years, 62.5% residual value Electronic test equipment and accessories 1 to 8 years, no residual value Liquid and solid containment tanks and boxes and accessories 10 to 20 years, no residual value Costs of Rental Related Services Costs of rental related services are primarily associated with relocatable modular building leases and liquid and solid containment tank and boxes. Modular building leases consist of costs for services to be provided under the negotiated lease agreement for delivery, installation, modifications, skirting, additional site-related work, and dismantle and return delivery. Costs related to these services are recognized on a straight-line basis over the term of the lease. Costs of rental related services associated with liquid and solid containment solutions consists of costs of delivery, removal and cleaning of the tanks and boxes. These costs are recognized in the period the service is performed. Impairment of Long-Lived Assets The Company evaluates the carrying value of rental equipment and identifiable definite lived intangible assets for impairment whenever events or circumstances have occurred that would indicate the carrying amount may not be fully recoverable. A key element in determining the recoverability of long-lived assets is the Company’s outlook as to the future market conditions for its rental equipment. If the carrying amount is not fully recoverable, an impairment loss is recognized to reduce the carrying amount to fair value. The Company determines fair value based upon the condition of the rental equipment and the projected net cash flows from its rental and sale considering current market conditions. Goodwill and identifiable indefinite lived assets are evaluated for potential impairment annually or when circumstances indicate potential impairment may have occurred. Impairment losses, if any, are determined based upon the excess of carrying value over the estimated fair value of the asset. There were no impairments of long-lived assets during the years ended December 31, 2015, 2014 and 2013. Other Direct Costs of Rental Operations Other direct costs of rental operations include direct labor, supplies, repairs, insurance, property taxes, license fees and certain modular lease costs charged to customers in the negotiated rental rate, which are recognized on a straight-line basis over the term of the lease. Cost of Sales Cost of sales in the Consolidated Statements of Income includes the carrying value of the equipment sold and all direct costs associated with the sale. Warranty Reserves Sales of new relocatable modular buildings, portable storage containers, electronic test equipment and related accessories and liquid and solid containment tanks and boxes not manufactured by the Company are typically covered by warranties provided by the manufacturer of the products sold. The Company typically provides limited 90-day warranties for certain sales of used rental equipment and one-year warranties on equipment manufactured by Enviroplex. Although the Company’s policy is to provide reserves for warranties when required for specific circumstances, the Company has not found it necessary to establish such reserves to date as warranty costs have not been significant. Property, Plant and Equipment Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is recognized on a straight-line basis for financial reporting purposes, and on an accelerated basis for income tax purposes. Depreciation expenses for property, plant and equipment is included in “Selling and administrative expenses” and “Rental related services” in the Consolidated Statements of Income. Maintenance and repairs are expensed as incurred. Property, plant and equipment consist of the following: (dollar amounts in thousands) Estimated useful life December 31, in years 2015 2014 Land Indefinite $ 40,378 $ 38,455 Land improvements 20 – 50 42,004 39,715 Buildings 30 25,520 21,486 Furniture, office and computer equipment 3 – 10 34,053 32,544 Machinery and service equipment 5 – 20 28,642 24,454 170,597 156,654 Less accumulated depreciation (61,410 ) (53,503 ) 109,187 103,151 Construction in progress 566 5,477 $ 109,753 $ 108,628 Property, plant and equipment depreciation expense was $8.2 million, $7.6 million and $7.8 million for the years ended December 31, 2015, 2014 and 2013, respectively. Construction in progress at December 31, 2015 and 2014 consisted primarily of costs related to acquisition of land and land improvements. Capitalized Software Costs The Company capitalizes certain development costs incurred in connection with its internal use software. Costs incurred in the preliminary stages of development are expensed as incurred. Once an application has reached the development stage, direct internal and external costs are capitalized until the software is substantially complete and ready for its intended use. These costs generally include external direct costs of materials and services consumed in the project and internal costs, such as payroll and benefits of those employees directly associated with the development of the software. Maintenance and training costs are expensed as incurred. The Company also capitalizes costs related to specific upgrades and enhancements when it is probable the expenditures will result in additional functionality. Capitalized software costs are included in property, plant and equipment. The Company capitalized $0.6 million and $0.4 million in internal use software during the years ended December 31, 2015 and 2014, respectively. Advertising Costs Advertising costs are expensed as incurred. Total advertising expenses were $2.8 million, $2.4 million and $2.4 million for the years ended December 31, 2015, 2014 and 2013. Income Taxes Income taxes are accounted for using an asset and liability approach. Deferred tax assets and liabilities are recorded for the effect of temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements. Deferred tax assets and deferred tax liabilities are adjusted to the extent necessary to reflect tax rates expected to be in effect when temporary differences reverse. Adjustments may be required to deferred tax assets and deferred tax liabilities due to changes in tax laws and audit adjustments by tax authorities. To the extent adjustments are required in any given period, the adjustments would be included within the tax provision in the Consolidated Statements of Income. The Company has not recorded a valuation allowance for its deferred tax assets. A valuation allowance would be established if, based on the weight of available evidence, management believes that it is more likely than not that some portion or all of a recorded deferred tax asset would not be realized in future periods. Goodwill and Intangible Assets Purchase prices of acquired businesses have been allocated to the assets and liabilities acquired based on the estimated fair values on the respective acquisition dates. Based on these values, the excess purchase prices over the fair value of the net assets acquired were allocated to goodwill and other intangible assets. Intangible assets related to customer relationships are amortized over eleven years. At December 31, 2015 and 2014, goodwill and trade name intangible assets which have indefinite lives totaled $33.5 million. 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 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 would be recognized as 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 impairment review of the Company’s goodwill and indefinite lived assets is performed by first assessing qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test. In the first step, the fair value of the reporting unit is compared to its carrying value to determine if the goodwill and intangible assets are impaired. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, then goodwill and intangible assets are not impaired and no further testing is required. If the carrying value of the net assets assigned to the reporting unit were to exceed its fair value, then the second step is performed in order to determine the implied fair value of the reporting unit’s goodwill and intangible assets and an impairment loss is recorded for an amount equal to the difference between the implied fair value and the carrying value of the goodwill and intangible assets. The Company conducted 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 years ended 2015, 2014 or 2013. Determining the fair value of a reporting unit is judgmental 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. 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 effects of stock options, unvested restricted stock awards and other potentially dilutive securities. The table below presents the weighted-average common stock used to calculate basic and diluted earnings per share: (in thousands) Year Ended December 31, 2015 2014 2013 Weighted-average common stock for calculating basic earnings per share 25,369 25,914 25,433 Effect of potentially dilutive securities from equity-based compensation 88 261 493 Weighted-average common stock for calculating diluted earnings per share 25,457 26,175 25,926 The following securities were not included in the computation of diluted earnings per share as their effect would have been anti-dilutive: (in thousands) Year Ended December 31, 2015 2014 2013 Options to purchase common stock 746 9 20 In May 2008, the Company’s Board of Directors authorized the Company to repurchase an aggregate of 2,000,000 shares of the Company's outstanding common stock. The Company has in the past made purchases of shares of its common stock from time to time in over-the-counter market (NASDAQ) transactions, through privately negotiated, large block transactions and through a share repurchase plan, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934. In August 2015, the Company’s Board of Directors authorized the Company to repurchase an additional 2,000,000 shares of the Company's outstanding common stock. The amount and time of the specific repurchases are subject to prevailing market conditions, applicable legal requirements and other factors, including management’s discretion. All shares repurchased by the Company are canceled and returned to the status of authorized but unissued shares of common stock. There can be no assurance that any authorized shares will be repurchased and the repurchase program may be modified, extended or terminated by the board of directors at any time. The following table presents share repurchase activities during the years ended December 31, 2015 and 2014: Year ended December 31 (in thousands, except share and per share amounts) 2015 2014 Number of shares repurchased 2,407,974 — Aggregate purchase price $ 63,953 — Average price per repurchased shares $ 26.56 — As of December 31, 2015, 1,592,026 shares remain authorized for repurchase. Accounts Receivable and Concentration of Credit Risk The Company’s accounts receivable consist of amounts due from customers for rentals, sales, financed sales and unbilled amounts for the portion of modular building end-of-lease services earned, which were negotiated as part of the lease agreement. Unbilled receivables related to end-of-lease services, which consists of dismantle and return delivery of buildings, were $25.0 million at December 31, 2015 and $21.1 million at December 31, 2014. The Company sells primarily on 30-day terms, individually performs credit evaluation procedures on its customers on each transaction and will require security deposits from its customers when a significant credit risk is identified. The Company records an allowance for doubtful accounts in amounts equal to the estimated losses expected to be incurred in the collection of the accounts receivable. The estimated losses are based on historical collection experience in conjunction with an evaluation of the current status of the existing accounts. Customer accounts are written off against the allowance for doubtful accounts when an account is determined to be uncollectable. The allowance for doubtful accounts activity was as follows: (in thousands) 2015 2014 Beginning balance, January 1 $ 2,038 $ 2,007 Provision for doubtful accounts 2,149 1,825 Write-offs, net of recoveries (2,100 ) (1,794 ) Ending balance, December 31 $ 2,087 $ 2,038 Financial instruments that potentially subject the Company to concentration of credit risk consist primarily of trade accounts receivable. From time to time, the Company maintains cash balances in excess of the Federal Deposit Insurance Corporation limits. Fair Value of Financial Instruments The Company believes that the carrying amounts for cash, accounts receivable, accounts payable and notes payable approximate their fair values except for fixed rate debt included in notes payable which has an estimated fair value of $160.6 million and $122.9 million compared to the recorded value of $160.0 million and $120.0 million as of December 31, 2015 and 2014, respectively. The estimates of fair value of the Company’s fixed rate debt are based on the borrowing rates currently available to the Company for bank loans with similar terms and average maturities. Foreign Currency Transactions and Translation The Company's Canadian subsidiary, TRS-RenTelco Inc., a British Columbia corporation (“TRS-Canada”), functions as a branch sales office for TRS-RenTelco in Canada. The functional currency for TRS-Canada is the U.S. dollar. Foreign currency transaction gains and losses of TRS-Canada are reported in the results of operations in the period in which they occur. The Company’s Indian subsidiary, TRS-RenTelco India Private Limited (“TRS-India”), functions as a rental and sales office for TRS-RenTelco in India. The functional currency for TRS-India is the Indian Rupee. All assets and liabilities of TRS-India are translated into U.S. dollars at period-end exchange rates and all income statement amounts are translated at the average exchange rate for each month within the year. Currently, the Company does not use derivative instruments to hedge its economic exposure with respect to assets, liabilities and firm commitments as the foreign currency transactions and risks to date have not been significant. Share-Based Compensation The Company measures and recognizes the compensation expense for all share-based awards made to employees and directors, including stock options, stock appreciation rights (“SARs”) and restricted stock units (“RSUs”), based upon estimated fair values. The fair value of stock options and SARs is estimated on the date of grant using the Black-Scholes option pricing model and for RSUs based upon the fair market value of the underlying shares of common stock as of the date of grant. The Company recognizes share-based compensation cost ratably on a straight-line basis over the requisite service period, which generally equals the vesting period. For performance-based RSUs, compensation costs are recognized when vesting conditions are met. In addition, the Company estimates the probable number of shares of common stock that will be earned and the corresponding compensation cost until the achievement of the performance goal is known. The Company records share-based compensation costs in “Selling and administrative expenses” in the Consolidated Statements of Income. The Company recognizes a benefit from share-based compensation in the Consolidated Statements of Shareholders’ Equity if an incremental tax benefit is realized. Further information regarding share-based compensation can be found in “Note 5 –Benefit Plans”. Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions in determining reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during each period presented. Actual results could differ from those estimates. The most significant estimates included in the financial statements are the future cash flows and fair values used to determine the recoverability of the rental equipment and identifiable definite lived intangible assets carrying value, the various assets’ useful lives and residual values, and the allowance for doubtful accounts. New Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers. The objective of this guidance is to establish the principles to report useful information to users of financial statements about the nature, timing and uncertainty of revenue from contracts with customers. In August 2015, the FASB issued an update to defer the effective date of this guidance by one year. The guidance in the update is effective for the interim and annual reporting periods beginning after December 15, 2017. The Company is currently evaluating the impact of the adoption of this accounting guidance on its consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-03, Imputation of Interest (Subtopic 835-30). The amendments in this update require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with the presentation of debt discounts. The guidance in this update does not address presentation or subsequent measurement of debt issuance cost related to line-of-credit arrangements. In August of 2015, the FASB issued ASU No. 2015-15, Imputation of Interest (Subtopic 835-30), to add SEC paragraphs pursuant to the SEC Staff Announcement that the SEC Staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance cost ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The amendments are effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The application of this guidance will result in a reclassification of debt financing costs from prepaid expenses and other assets to a reduction of the specific debt liability, and will not affect the Company’s statement of operations or cash flows. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805). The ASU No. 2015-16 requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendment requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed on the acquisition date. The amendment requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The provisions of the ASU No. 2015-16 are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The Company does not expect the adoption of this accounting guidance to have a significant impact on its consolidated financial statements.

Financed Lease Receivables

Financed Lease Receivables	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Financed Lease Receivables	NOTE 2. FINANCED LEASE RECEIVABLES The Company has entered into sales-type leases to finance certain equipment sales to customers. The lease agreements have a bargain purchase option at the end of the lease term. The minimum lease payments receivable and the net investment included in accounts receivable for such leases are as follows: (in thousands) December 31, 2015 2014 Gross minimum lease payments receivable $ 2,745 $ 3,489 Less – unearned interest (175 ) (188 ) Net investment in sales type lease receivables $ 2,570 $ 3,301 As of December 31, 2015, the future minimum lease payments under non-cancelable sales-type leases to be received in 2016 and thereafter are as follows: (in thousands) Year Ended December 31, 2016 $ 1,558 2017 1,173 2018 14 2019 — Total minimum future lease payments $ 2,745

Notes Payable

Notes Payable	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Notes Payable	NOTE 3. NOTES PAYABLE Notes payable consists of the following: (in thousands) December 31, 2015 2014 Unsecured revolving lines of credit $ 221,441 $ 202,478 4.03% Series A senior notes due in 2018 60,000 80,000 3.68% Series B senior notes due in 2021 40,000 40,000 3.84% Series C senior notes due in 2022 60,000 — $ 381,441 $ 322,478 As of December 31, 2015, the future minimum payments under the unsecured revolving lines of credit, 4.03% Series A senior notes due in 2018, 3.68% Series B senior notes due in 2021 and 3.84% Series C senior notes due in 2022 are as follows: (in thousands) Year Ended December 31, 2016 $ 20,000 2017 241,441 2018 20,000 2019 — 2020 — 2021 and thereafter 100,000 $ 381,441 Unsecured Revolving Lines of Credit In June 2012, the Company entered into an amended and restated credit agreement with a syndicate of banks (the “Amended Credit Facility”). The five-year facility matures on June 15, 2017 and replaced the Company’s prior $350.0 million unsecured revolving credit facility. The Amended Credit Facility provides for a $420.0 million unsecured revolving credit facility (which may be increased to $450.0 million with $30.0 million of additional commitments), which includes a $25.0 million sublimit for the issuance of standby letters of credit and a $10.0 million sublimit for swingline loans. Amounts outstanding under the Amended Credit Facility at December 31, 2015 and 2014 were $218.0 million and $200.0 million, respectively. In June 2012, the Company entered into a Credit Facility Letter Agreement and a Credit Line Note in favor of MUFG Union Bank, N.A., extending its line of credit facility related to its cash management services (“Sweep Service Facility”) and increasing the facility size from $5.0 million to $10.0 million. The Sweep Service Facility matures on the earlier of June 15, 2017, or the date the Company ceases to utilize MUFG Union Bank, N.A. for its cash management services. Amounts outstanding under the Sweep Service Facility at December 31, 2015 and 2014 were $3.4 million and $2.5 million, respectively. At December 31, 2015, under the Amended Credit Facility and Sweep Service Facility, the Company had unsecured lines of credit that permit it to borrow up to $430.0 million of which $221.4 million was outstanding, and had capacity to borrow up to an additional $208.6 million. The Amended Credit Facility contains financial covenants requiring the Company to not (all defined terms used below not otherwise defined herein have the meaning assigned to such terms in the Amended Credit Facility): · Permit the Consolidated Fixed Charge Coverage Ratio of EBITDA to fixed charges as of the end of any fiscal quarter to be less than 2.50 to 1. At December 31, 2015, the actual ratio was 3.85 to 1. · Permit the Consolidated Leverage Ratio of funded debt to EBITDA at any time during any period of four consecutive fiscal quarters to be greater than 2.75 to 1. At December 31, 2015, the actual ratio was 2.32 to 1. · Permit Tangible Net Worth as of the end of any fiscal quarter of the Company to be less than the sum of (i) $246.1 million plus (ii) 25% of the Company’s Consolidated Net Income (as defined in the Amended Credit Facility) (but only if a positive number) for each fiscal quarter ended subsequent to December 31, 2011 plus (iii) 90% of the net cash proceeds from the issuance of the Company’s capital stock after December 31, 2011. At December 31, 2015, such sum was $304.9 million and the actual Tangible Net Worth of the Company was $342.4 million. Amounts borrowed under the Amended Credit Facility bear interest at the Company’s option at either: (i) LIBOR plus a defined margin, or (ii) the Agent bank’s prime rate (“base rate”) plus a margin. The applicable margin for each type of loan is measured based upon the Consolidated Leverage Ratio at the end of the prior fiscal quarter and ranges from 1.00% to 1.75% for LIBOR loans and 0% to 0.75% for base rate loans. In addition, the Company pays an unused commitment fee for the portion of the $420.0 million credit facility that is not used. These fees are based upon the Consolidated Leverage Ratio and range from 0.15% to 0.30%. As of December 31, 2015 and 2014, the applicable margins were 1.75% and 1.50% for LIBOR based loans, respectively, 0.75% and 0.50% for base rate loans, respectively and 0.30% and 0.25% for unused fees, respectively. Amounts borrowed under the Sweep Service Facility are based upon the MUFG Union Bank, N.A. base rate plus an applicable margin and an unused commitment fee for the portion of the $10.0 million facility not used. The applicable base rate margin and unused commitment fee rates for the Sweep Service Facility are the same as for the Amended Credit Facility. The following information relates to the lines of credit for each of the following periods: (dollar amounts in thousands) Year Ended December 31, 2015 2014 Maximum amount outstanding $ 295,588 $ 208,894 Average amount outstanding $ 236,860 $ 191,248 Weighted average interest rate, during the period 2.35 % 2.41 % Prime interest rate, end of period 3.50 % 3.25 % 4.03% Senior Notes Due in 2018 On April 21, 2011, the Company entered into a Note Purchase and Private Shelf Agreement (the “Note Purchase Agreement”) with Prudential Investment Management, Inc. (“PIM”), The Prudential Insurance Company of America and Prudential Retirement Insurance and Annuity Company (collectively, the “Purchaser”), pursuant to which the Company agreed to sell an aggregate principal amount of $100.0 million of its 4.03% Series A Senior Notes (the “Series A Senior Notes”) to the Purchaser. The Series A Senior Notes are an unsecured obligation of the Company, due on April 21, 2018. Interest on these notes is due semi-annually in arrears and the principal is due in five equal annual installments, with the first payment due on April 21, 2014. At December 31, 2015 and 2014, the principal balance outstanding under the Series A Senior Notes were $60.0 million and $80.0 million, respectively. On March 17, 2014, the Company entered into an Amendment to the Note Purchase Agreement (“2014 Amendment”) with the Purchaser. The 2014 Amendment amended certain terms of the Note Purchase Agreement. Pursuant to the 2014 Amendment, among other things, the issuance period for additional senior notes (“Shelf Notes”) to be issued and sold pursuant to the Note Purchase Agreement is extended until the earlier of March 17, 2017 or the termination of the issuance and sale of the Shelf Notes upon the 30 days’ prior notice of either PIM or the Company. 3.68% Senior Notes Due in 2021 On March 17, 2014, the Company issued and sold to the Purchasers a $40.0 million aggregate principal amount of its 3.68% Series B Senior Notes (the “Series B Senior Notes”) pursuant to the terms of the Note Purchase Agreement, as amended. The Series B Senior Notes are an unsecured obligation of the Company, bear interest at a rate of 3.68% per annum and mature on March 17, 2021. Interest on the Series B Senior Notes is payable semi-annually beginning on September 17, 2014 and continuing thereafter on March 17 and September 17 of each year until maturity. The full net proceeds from the Series B Senior Notes were used for working capital and other general corporate purposes. At December 31, 2015, the principal balance outstanding under the Series B Senior Notes was $40.0 million. 3.84% Senior Notes Due in 2022 On November 5, 2015, the Company issued and sold to the Purchasers a $60.0 million aggregate principal amount of its 3.84% Series C Senior Notes (the “Series C Senior Notes”) pursuant to the terms of the Note Purchase Agreement, as amended. The Series C Senior Notes are an unsecured obligation of the Company, bear interest at a rate of 3.84% per annum and mature on November 5, 2022. Interest on the Series C Senior Notes is payable semi-annually beginning on May 5, 2016 and continuing thereafter on November 5 and May 5 of each year until maturity. The full net proceeds from the Series C Senior Notes were used to reduce the outstanding balance on the Company’s revolving credit line. At December 31, 2015, the principal balance outstanding under the Series C Senior Notes was $60.0 million. Among other restrictions, the Note Purchase Agreement, under which the Series A Senior Notes, Series B Senior Notes and Series C Senior Notes were sold, contains financial covenants requiring the Company to not (all defined terms used below not otherwise defined herein have the meaning assigned to such terms in the Note Purchase Agreement): · Permit the Consolidated Fixed Charge Coverage Ratio of EBITDA to fixed charges as of the end of any fiscal quarter to be less than 2.50 to 1. At December 31, 2015, the actual ratio was 3.85 to 1. · Permit the Consolidated Leverage Ratio of funded debt to EBITDA at any time during any period of four consecutive quarters to be greater than 2.75 to 1. At December 31, 2015, the actual ratio was 2.32 to 1. · Permit Tangible Net Worth, calculated as of the last day of each fiscal quarter, to be less than the sum of (i) $229.0 million, plus (ii) 25% of net income for such fiscal quarter subsequent to December 31, 2010, plus (iii) 90% of the net cash proceeds from the issuance of the Company’s capital stock after December 31, 2010. At December 31, 2015, such sum was $304.9 million and the actual Tangible Net Worth of the Company was $342.4 million. At December 31, 2015, the Company was in compliance with each of the aforementioned covenants. There are no anticipated trends that the Company is aware of that would indicate non-compliance with these covenants, though, significant deterioration in the Company’s financial performance could impact its ability to comply with these covenants.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 4. INCOME TAXES Income before provision for income taxes consisted of the following: (in thousands) Year Ended December 31, 2015 2014 2013 U.S. $ 66,889 $ 76,848 $ 71,678 Foreign (512 ) (287 ) (304 ) $ 66,377 $ 76,561 $ 71,374 The provision for income taxes consisted of the following: (in thousands) Year Ended December 31, 2015 2014 2013 Current: U.S. Federal $ 7,976 $ 7,494 $ 1,188 State 1,851 2,139 1,803 Foreign 1,645 1,572 2,217 11,472 11,205 5,208 Deferred: U.S. Federal 13,201 17,986 21,067 State 1,538 1,927 1,818 Foreign (304 ) (266 ) (116 ) 14,435 19,647 22,769 Total $ 25,907 $ 30,852 $ 27,977 The reconciliation of the U.S. federal statutory tax rate to the Company’s effective tax rate is as follows: Year Ended December 31, 2015 2014 2013 U.S. federal statutory rate 35.0 % 35.0 % 35.0 % State taxes, net of federal benefit 4.2 4.1 4.1 Other (0.2 ) 1.2 0.1 39.0 % 40.3 % 39.2 % The following table shows the deferred income taxes related to the temporary differences between the tax bases of assets and liabilities and the respective amounts included in “Deferred income taxes, net” on the Company’s Consolidated Balance Sheets: (in thousands) December 31, 2015 2014 Deferred tax liabilities: Accelerated depreciation $ 286,618 $ 272,496 Prepaid costs currently deductible 6,997 6,358 Other 5,034 4,404 Total deferred tax liabilities 298,649 283,258 Deferred tax assets: Accrued costs not yet deductible 8,638 7,463 Allowance for doubtful accounts 804 788 Net operating loss carry forwards and credits 577 302 Deferred revenues 1,945 1,132 Share-based compensation 3,334 4,671 Total deferred tax assets 15,298 14,356 Deferred income taxes, net $ 283,351 $ 268,902 In 2015 exercises of non-qualified stock options by employees resulted in a tax shortfall of $0.3 million. In 2014 and 2013 exercises of non-qualified stock options by employees resulted in an excess tax benefit of $1.8 million and $1.3 million, respectively. The net tax benefit was recorded as common stock in conjunction with the proceeds received from the exercise of the stock options. A deferred U.S. tax liability has not been provided on the undistributed earnings of certain foreign subsidiaries because it is the Company’s intent to permanently reinvest such earnings. Undistributed earnings of foreign subsidiaries, which have been or are intended to be permanently reinvested, aggregated approximately $1.9 million and $1.6 million as of December 31, 2015 and 2014, respectively. As of December 31, 2015, the Company’s foreign net operating losses for tax purposes were $1.8 million. If not utilized, these carry forwards will begin to expire in 2023. The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority. The Company evaluated all of its tax positions for which the statute of limitations remained open and determined there were no material unrecognized tax benefits as of December 31, 2015 and 2014. In addition, there have been no material changes in unrecognized benefits during 2015, 2014 and 2013. The Company is subject to income taxes in the U.S. federal jurisdiction, and various states and foreign jurisdictions. Tax regulations within each jurisdiction are subject to interpretation of the related tax laws and regulations and require the application of significant judgment. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for the years before 2011. Our income tax returns are subject to examination by federal, state and foreign tax authorities. There may be differing interpretations of tax laws and regulations, and as a result, disputes may arise with these tax authorities involving the timing and amount of deductions and allocation of income. The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes for all periods presented. Such interest and penalties were not significant for the years ended December 31, 2015, 2014 and 2013.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Benefit Plans	NOTE 5. BENEFIT PLANS Stock Plans The Company adopted the 2007 Stock Incentive Plan (the “2007 Plan”) effective June 6, 2007, under which 1,875,000 shares of common stock of the Company, plus the number of shares that remained available for grants of awards under the Company’s 1998 Stock Option Plan (the “1998 Plan”) and those shares that become available as a result of forfeiture, termination, or expiration of awards previously granted under the 1998 Plan, were reserved for the grant of awards to its employees, directors and consultants to acquire common stock of the Company. The 2007 Plan is a shareholder approved plan with the initial 1,875,000 share authorization increased by 815,000 shares in 2009 and 1,500,000 shares in 2012. The 2007 Plan provides for the grant of awards in the form of stock options, stock appreciation rights, RSUs, the vesting of which may be performance-based or service-based, and other rights and benefits. Each RSU issued reduces the number of shares of the Company’s common stock available for grant under the 2007 Plan by two shares. Options under the 2007 Plan are granted at an exercise price of not less than 100% of the fair market value of the Company's common stock on the date of grant. There were no modifications to the 2007 Plan and no awards classified as liabilities in the year ended December 31, 2015. For the years ended December 31, 2015, 2014 and 2013, the share-based compensation expense was $3.4 million, $3.9 million and $3.7 million, respectively, before provision for income taxes. The Company recorded a tax benefit of approximately $1.3 million, $1.5 million and $1.4 million, respectively, related to the aforementioned share-based compensation expenses. There was no capitalized share-based compensation expense in the years ended December 31, 2015, 2014 and 2013. For the years ended December 31, 2015, 2014 and 2013, the share-based compensation expenses, net of taxes, reduced net income by $2.1 million, $2.3 million and $2.2 million, respectively, or $0.08, $0.09 and $0.09 per diluted share for the three years ended December 31, 2015, 2014 and 2013, respectively. Stock Options As of December 31, 2015, a cumulative total of 7,277,200 shares subject to options have been granted with exercise prices ranging from $3.47 to $38.89. Of these, options have been exercised for the purchase of 4,854,518 shares, while options for 1,012,032 shares have been terminated, and options for 1,410,650 shares with exercise prices ranging from $15.62 to $38.89 remained outstanding under the stock plans. Most of these options vest over five years and expire seven and ten years after grant. To date, no options have been issued to any of the Company’s non-employee advisors. As of December 31, 2015, 843,024 shares remained available for issuance of awards under the stock plans. A summary of the Company’s option activity and related information for the three years ended December 31, 2015 is as follows: Number of options Weighted- average price Weighted- average remaining contractual term (in years) Aggregate intrinsic value (in millions) Balance at December 31, 2012 2,838,553 $ 24.37 Options granted 192,800 29.14 Options exercised (1,237,341) 24.71 Options cancelled/forfeited/expired (21,950 ) 25.20 Balance at December 31, 2013 1,772,062 24.68 Options granted 203,600 32.79 Options exercised (612,682) 21.55 Options cancelled/forfeited/expired (19,220 ) 30.35 Balance at December 31, 2014 1,343,760 27.25 Options granted 456,200 31.69 Options exercised (270,650 ) 19.81 Options cancelled/forfeited/expired (118,660 ) 29.58 Balance at December 31, 2015 1,410,650 $ 29.91 3.82 $ (6.6 ) Exercisable at December 31, 2015 662,345 $ 27.53 1.89 $ (1.5 ) Expected to vest after December 31, 2015 673,475 $ 31.64 5.53 $ (4.3 ) The intrinsic value of stock options at any point in time is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company’s common stock. The aggregate intrinsic value of options exercised and sold under the Company’s stock option plans was $5.7 million, $8.4 million and $11.5 million for the years ended December 31, 2015, 2014 and 2013, respectively, determined as of the date of option exercise. As of December 31, 2015, there was approximately $4.5 million of total unrecognized compensation cost related to unvested share-based compensation option arrangements granted under the Company’s stock plans, which is expected to be recognized over a weighted-average period of 2.7 years. The following table indicates the options outstanding and options exercisable by exercise price with the weighted-average remaining contractual life for the options outstanding and the weighted-average exercise price at December 31, 2015: Options Outstanding Options Exercisable Exercise price Number outstanding at December Weighted- average remaining contractual life (Years) Weighted- average grant date value Number exercisable at December 31, 2015 Weighted- average grant date value $15 – 20 2,400 0.17 $ 15.62 2,400 $ 15.62 20 – 25 153,855 1.22 23.86 151,965 23.86 25 – 30 508,795 2.04 28.98 424,960 29.01 30 – 35 736,200 5.59 32.04 79,480 32.62 35 – 40 9,400 4.96 37.83 3,540 37.90 $15 – 40 1,410,650 3.82 $ 29.91 662,345 $ 27.53 The Company utilizes the Black-Scholes option-pricing model to estimate the fair value of share-based compensation at the date of grant, which requires the use of accounting judgment and financial estimates, including estimates of the expected term option holders will retain their vested stock options before exercising them, the estimated volatility of the Company’s stock price over the expected term and the expected number of options that will be forfeited prior to the completion of their vesting requirements. Application of alternative assumptions could produce significantly different estimates of the fair value of share-based compensation amounts recognized in the Consolidated Statements of Income. The fair value of each option granted was estimated on the date of grant using the Black-Scholes option-pricing model using the following weighted-average assumptions: Year Ended December 31, 2015 2014 2013 Expected term (in years) 5.0 5.0 5.0 Expected volatility 31.1 % 40.5 % 50.3 % Expected dividend yields 3.2 % 3.0 % 3.3 % Risk-free interest rates 1.6 % 1.5 % 0.8 % The Company monitors option exercise behavior to determine the appropriate homogenous groups for estimation purposes. Currently, the Company’s option activity is separated into two categories: directors and employees. The expected term of the options represents the estimated period of time until exercised and is based on historical experience, giving consideration to the option terms, vesting schedules and expectations of future behavior. Expected stock volatility is based on historical stock price volatility of the Company and the risk-free interest rates are based on U.S. Treasury yields in effect on the date of the option grant for the estimated period the options will be outstanding. The expected dividend yield is based upon the current dividend annualized as a percentage of the grant exercise price. The weighted average grant date fair value per share was $6.60, $9.17 and $9.87 during the years ended December 31, 2015, 2014 and 2013, respectively. Restricted Stock Units The following table summarizes the activity of the Company’s RSUs, which includes service-based and performance-based awards, for the three years ended December 31, 2015: Weighted- Aggregate average intrinsic Number grant Date value of shares fair value (in millions) Balance at December 31, 2012 262,820 28.22 RSUs granted 150,300 26.89 RSUs vested (87,840 ) 24.98 RSUs cancelled/forfeited/expired (4,300 ) 29.24 Balance at December 31, 2013 320,980 28.47 RSUs granted 118,864 30.85 RSUs vested (120,721 ) 27.30 RSUs cancelled/forfeited/expired (7,540 ) 30.34 Balance at December 31, 2014 311,583 29.78 RSUs granted 79,300 31.86 RSUs vested (89,915 ) 27.97 RSUs cancelled/forfeited/expired (80,320 ) 31.35 Balance at December 31, 2015 220,648 $ 30.70 $ 5.6 Performance-based RSUs vest over five years, with 60% of the shares immediately vesting after three years when the performance criteria has been determined to have been met and 20% of the remaining shares vesting annually at the anniversary of the performance determination date, subject to continuous employment of the participant. There were 66,651 performance-based RSUs expected to vest as of December 31, 2015. Service-based RSUs have been issued to the Company’s directors and generally vest over twelve to fourteen months. There were 18,000 service-based RSUs expected to vest as of December 31, 2015. No forfeitures are currently expected. Share-based compensation expense for RSUs for the year ended December 31, 2015, 2014 and 2013 was $1.7 million, $2.3 million and $2.0, respectively. As of December 31, 2015, the total unrecognized compensation expense related to unvested RSUs was $1.1 million and is expected to be recognized over a weighted-average period of 2.4 years. Employee Stock Ownership and 401(k) Plans On August 1, 2012 the Company amended and restated the Employee Stock Ownership Plan, the 401(k) Plans and the Enviroplex 401(k) Plans (“Plans”) to become the McGrath RentCorp Employee Stock Ownership and 401(k) Plan (the “KSOP”). In conjunction with this, the Plans’ assets totaling approximately $16.4 million in cash were concurrently transferred into the KSOP. The KSOP plan provides that each participant may annually contribute an elected percentage of his or her salary, not to exceed the statutory limit. The Company, at its discretion, may make matching contributions. Contributions are expensed in the year approved by the Board of Directors. Dividends on the Company’s stock held by the KSOP are treated as ordinary dividends and, in accordance with existing tax laws, are deducted by the Company in the year paid. For the year ended December 31, 2015 dividends deducted by the Company were $0.3 million, which resulted in a tax benefit of approximately $0.1 million in 2015. At December 31, 2015, the KSOP held 339,640 shares, or less than 2% of the Company’s total common shares outstanding. These shares are included in basic and diluted earnings per share calculations.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Shareholders' Equity	NOTE 6. SHAREHOLDERS’ EQUITY In May 2008, the Company’s Board of Directors authorized the Company to repurchase an aggregate of 2,000,000 shares of the Company's outstanding common stock. The Company has in the past made purchases of shares of its common stock from time to time in over-the-counter market (NASDAQ) transactions, through privately negotiated, large block transactions and through a share repurchase plan, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934. In August 2015, the Company’s Board of Directors authorized the Company to repurchase an additional 2,000,000 shares of the Company's outstanding common stock. The amount and time of the specific repurchases are subject to prevailing market conditions, applicable legal requirements and other factors, including management’s discretion. All shares repurchased by the Company are canceled and returned to the status of authorized but unissued shares of common stock. There can be no assurance that any authorized shares will be repurchased and the repurchase program may be modified, extended or terminated by the board of directors at any time. During the twelve months ended December 31, 2015, the Company repurchased 2,407,974 shares of common stock for an aggregate repurchase price of $64.0 million, or an average price of $26.56 per share. There were no repurchases of common stock during the twelve months ended December 31, 2014. As of December 31, 2015, 1,592,026 shares remain authorized for repurchase under this authorization.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 7. COMMITMENTS AND CONTINGENCIES The Company leases certain facilities under various operating leases. Most of the lease agreements provide the Company with the option of renewing its lease at the end of the lease term, at the fair rental value. In most cases, management expects that in the normal course of business, facility leases will be renewed or replaced by other leases. Minimum payments under these leases, exclusive of property taxes and insurance, are as follows: (in thousands) Year Ended December 31, 2016 $ 1,269 2017 874 2018 709 Thereafter — $ 2,852 Rent expense was $3.5 million, $3.4 million and $3.1 million in 2015, 2014 and 2013, respectively. The Company is involved in various lawsuits and routine claims arising out of the normal course of its business. The Company maintains insurance coverage for its operations and employees with appropriate aggregate, per occurrence and deductible limits as the Company reasonably determines necessary or prudent with current operations and historical experience. The major policies include coverage for property, general liability, auto, directors and officers, health, and workers’ compensation insurances. The Company records a provision for a liability when it believes that it is both probable that a liability has been incurred and the amount can be reasonably estimated. Significant judgment is required to determine both probability and the estimated amount. The Company reviews these provisions at least quarterly and adjusts these provisions to reflect the impact of negotiations, settlements, rulings, advice of legal counsel, and updated information. Litigation is inherently unpredictable and is subject to significant uncertainties, some of which are beyond the Company’s control. In the opinion of management, there was not at least a reasonable possibility that the ultimate amount of liability not covered by insurance, if any, under any pending litigation and claims, individually or in the aggregate, will have a material adverse effect on the financial position or operating results of the Company.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	NOTE 8. INTANGIBLE ASSETS Intangible assets consist of the following: (dollar amounts in thousands) Estimated useful life December 31, (In years) 2015 2014 Trade name Indefinite $ 5,700 $ 5,700 Customer relationships 11 9,611 9,611 15,311 15,311 Less accumulated amortization (5,846 ) (4,975 ) $ 9,465 $ 10,336 Intangible assets with finite useful lives are amortized over their respective useful lives. Amortization expense for the years ended December 31, 2015, 2014 and 2013 were $0.9 million, $0.8 million and $0.8 million, respectively. Based on the carrying values at December 31, 2015 and assuming no subsequent impairment of the underlying assets, the annual amortization is expected to be $0.9 million in 2016 through 2019 and $0.2 million in 2020.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 9. RELATED PARTY TRANSACTIONS The Company acquired liquid and solid containment tanks totaling $13.6 million during the year ended December 31, 2013 from Sabre Manufacturing, LLC (“Sabre”), which was controlled by the President of Adler Tanks until August 16, 2013 when Sabre was sold to an unrelated party. Amounts due to Sabre at December 31, 2013 were zero. There were no related party transactions in the years ended December 31, 2015 and 2014, or amounts owed to related parties at such dates.

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Reporting	NOTE 10. SEGMENT REPORTING FASB guidelines establish annual and interim reporting standards for an enterprise’s operating segments and related disclosures about its products, services, geographic areas and major customers. In accordance with these guidelines the Company’s four reportable segments are Mobile Modular, TRS-RenTelco, Adler Tanks and Enviroplex. Management focuses on several key measures to evaluate and assess each segment’s performance including rental revenue growth, gross margin, 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 amongst Mobile Modular, TRS-RenTelco and Adler Tanks based on their pro-rata share of average rental equipment at cost, goodwill, 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 years ended December 31, 2015, 2014 and 2013, 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, 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 operation 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) 53,796 21,784 17,955 1,728 95,263 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 % Segment Data (Continued) (dollar amounts in thousands) Mobile Modular TRS- RenTelco Adler Tanks Enviroplex 1 Consolidated Year Ended December 31, 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 operation 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) 46,797 28,849 21,031 4,617 101,294 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 % 2013 Rental revenues $ 82,503 $ 102,101 $ 71,162 $ — $ 255,766 Rental related services revenues 28,891 3,095 21,162 — 53,148 Sales and other revenues 21,267 29,857 1,616 17,855 70,595 Total revenues 132,661 135,053 93,940 17,855 379,509 Depreciation of rental equipment 14,459 39,953 13,796 — 68,208 Gross profit 50,423 63,520 51,076 3,996 169,015 Selling and administrative expenses 36,488 24,542 24,644 3,091 88,765 Income from operation 13,935 38,978 26,432 905 80,250 Interest expense (income) allocation 4,318 2,156 2,419 (206 ) 8,687 Income before provision for income taxes 9,617 36,633 24,013 1,111 71,374 Rental equipment acquisitions 52,953 52,625 31,023 — 136,601 Accounts receivable, net (period end) 37,163 27,328 21,915 1,244 87,650 Rental equipment, at cost (period end) 592,391 267,772 284,005 — 1,144,168 Rental equipment, net book value (period end) 415,366 109,988 241,656 — 767,010 Utilization (period end) 2 70.7 % 58.2 % 57.7 % Average utilization 2 68.3 % 62.7 % 64.2 % 1 Gross Enviroplex sales revenues were $11,530, $19,017 and $17,859 in 2015, 2014 and 2013, respectively, which includes inter-segment sales to Mobile Modular of $918, $1,560 and $4, 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. No single customer accounted for more than 10% of total revenues during 2015, 2014 and 2013. Revenue from foreign country customers accounted for 5%, 5% and 7% of the Company’s revenues for the same periods, respectively.

Quarterly Financial Information

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	NOTE 11. QUARTERLY FINANCIAL INFORMATION (unaudited) Quarterly financial information for each of the two years ended December 31, 2015 is summarized below: (in thousands, except per share amounts) 2015 First Second Third Fourth Year Operations Data Rental revenues $ 65,502 $ 67,305 $ 70,195 $ 70,694 $ 273,696 Total revenues 90,188 96,026 113,048 105,282 404,544 Gross profit 39,087 40,918 50,146 46,756 176,907 Income from operations 13,875 16,465 25,150 21,467 76,957 Income before provision for income taxes 11,316 14,033 22,505 18,523 66,377 Net income 6,846 8,490 13,616 11,518 40,470 Earnings per share: Basic $ 0.26 $ 0.33 $ 0.54 $ 0.48 $ 1.60 Diluted $ 0.26 $ 0.32 $ 0.54 $ 0.48 $ 1.59 Dividends declared per share $ 0.250 $ 0.250 $ 0.250 $ 0.250 $ 1.00 Shares used in per share calculations: Basic 26,091 26,142 25,334 23,932 25,369 Diluted 26,276 26,273 25,408 24,015 25,457 Balance Sheet Data Rental equipment, net $ 839,078 $ 856,489 $ 864,277 $ 869,601 $ 869,601 Total assets 1,112,056 1,132,750 1,149,095 1,152,709 1,152,709 Notes payable 320,923 337,177 382,113 381,441 381,441 Shareholders’ equity 425,848 426,823 389,464 379,687 379,687 2014 First Second Third Fourth Year Operations Data Rental revenues $ 62,430 $ 65,809 $ 69,642 $ 71,694 $ 269,575 Total revenues 87,560 95,745 113,025 111,792 408,122 Gross profit 38,638 42,079 49,298 52,204 182,219 Income from operations 15,227 18,239 25,098 26,796 85,360 Income before provision for income taxes 12,936 16,794 22,609 24,222 76,561 Net income 7,871 10,205 13,746 13,887 45,709 Earnings per share: Basic $ 0.31 $ 0.39 $ 0.53 $ 0.54 $ 1.77 Diluted $ 0.30 $ 0.39 $ 0.53 $ 0.53 $ 1.75 Dividends declared per share $ 0.245 $ 0.245 $ 0.245 $ 0.245 $ 0.98 Shares used in per share calculations: Basic 25,789 25,912 25,953 25,999 25,914 Diluted 26,230 26,220 26,152 26,206 26,175 Balance Sheet Data Rental equipment, net $ 775,875 $ 795,532 $ 817,898 $ 825,750 $ 825,750 Total assets 1,021,613 1,051,764 1,089,130 1,116,407 1,116,407 Notes payable 288,081 307,000 322,280 322,478 322,478 Shareholders’ equity 401,563 406,439 414,519 424,531 424,531

Subsequent Event

Subsequent Event	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Event	NOTE12. SUBSEQUENT EVENT On February 9, 2016, the Company entered into an amendment to the Note Purchase Agreement (“2016 Amendment”) with the Purchaser. Pursuant to the 2016 Amendment, (i) the issuance period for the shelf notes to be issued and sold pursuant to the Note Purchase Agreement is extended until the earlier of February 9, 2019 or the termination of the issuance and sale of the shelf notes upon the 30 days’ prior notice of either PIM or the Company, and (ii) the definition of the “Available Facility Amount,” which is the aggregate amount of the shelf notes that may be authorized for purchase pursuant to the Note Purchase Agreement was amended to equal a formula based on: $250 million, minus the aggregate principal amount of the shelf notes then outstanding and purchased pursuant to the Note Purchase Agreement, minus the shelf notes accepted by the Company for purchase, but not yet purchased, by the Purchaser pursuant to the Note Purchase Agreement; provided, however, the aggregate amount of the shelf notes purchased by any corporation or other entity controlling, controlled by, or under common control with, PIM shall not exceed $200 million.

Summary of Significant Accoun21

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Organization	Organization McGrath RentCorp and its wholly-owned subsidiaries (the “Company”) is a California corporation organized in 1979. The Company is a diversified business to business rental company with four rental divisions; relocatable modular buildings, portable storage containers, electronic test equipment and liquid and solid containment tanks and boxes. Although the Company’s primary emphasis is on equipment rentals, sales of equipment occur in the normal course of business. The Company is comprised of four reportable business segments: modular building and portable storage segment (“Mobile Modular”), electronic test equipment segment (“TRS-RenTelco”), containment solutions for the storage of hazardous and non-hazardous liquids and solids segment (“Adler Tanks”) and classroom manufacturing division selling modular classrooms in California (“Enviroplex”).
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of McGrath RentCorp and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Revenue Recognition	Revenue Recognition Rental revenue from operating leases is recognized on a straight-line basis over the term of the lease. Rental billings for periods extending beyond period end are recorded as deferred income and are recognized when earned. Rental related services revenue is primarily associated with relocatable modular building and liquid and solid containment tanks and boxes leases. For modular building leases, rental related services revenue consists of billings to customers for modifications, delivery, installation, additional site-related work, and dismantle and return delivery. For modular building leases, revenue related to delivery, installation, dismantle and return delivery are an integral part of the negotiated lease agreement with customers and are recognized on a straight-line basis over the term of the lease. For liquid and solid containment solutions, rental related services revenue consists of billings for delivery, removal and cleaning of the tanks and boxes. These revenues are recognized in the period performed. Sales revenue is recognized upon delivery and installation of the equipment to customers. Certain leases are accounted for as sales-type leases. For these leases, sales revenue and the related accounts receivable are recognized upon delivery and installation of the equipment and the unearned interest is recognized over the lease term on a basis which results in a constant rate of return on the unrecovered lease investment. Other revenue is recognized when earned and primarily includes interest income on sales-type leases, rental income on facility rentals and certain logistics services. Sales taxes charged to customers are reported on a net basis and are excluded from revenues and expenses.
Depreciation of Rental Equipment	Depreciation of Rental Equipment Rental equipment is depreciated on a straight-line basis for financial reporting purposes and on an accelerated basis for income tax purposes. The costs of major refurbishment of relocatable modular buildings and portable storage containers are capitalized to the extent the refurbishment significantly adds value to, or extends the life of the equipment. Maintenance and repairs are expensed as incurred. The estimated useful lives and residual values of the Company’s rental equipment used for financial reporting purposes are as follows: Relocatable modular buildings 18 years, 50% residual value Relocatable modular accessories 3 to 18 years, no residual value Portable storage containers 25 years, 62.5% residual value Electronic test equipment and accessories 1 to 8 years, no residual value Liquid and solid containment tanks and boxes and accessories 10 to 20 years, no residual value
Costs of Rental Related Services	Costs of Rental Related Services Costs of rental related services are primarily associated with relocatable modular building leases and liquid and solid containment tank and boxes. Modular building leases consist of costs for services to be provided under the negotiated lease agreement for delivery, installation, modifications, skirting, additional site-related work, and dismantle and return delivery. Costs related to these services are recognized on a straight-line basis over the term of the lease. Costs of rental related services associated with liquid and solid containment solutions consists of costs of delivery, removal and cleaning of the tanks and boxes. These costs are recognized in the period the service is performed.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company evaluates the carrying value of rental equipment and identifiable definite lived intangible assets for impairment whenever events or circumstances have occurred that would indicate the carrying amount may not be fully recoverable. A key element in determining the recoverability of long-lived assets is the Company’s outlook as to the future market conditions for its rental equipment. If the carrying amount is not fully recoverable, an impairment loss is recognized to reduce the carrying amount to fair value. The Company determines fair value based upon the condition of the rental equipment and the projected net cash flows from its rental and sale considering current market conditions. Goodwill and identifiable indefinite lived assets are evaluated for potential impairment annually or when circumstances indicate potential impairment may have occurred. Impairment losses, if any, are determined based upon the excess of carrying value over the estimated fair value of the asset. There were no impairments of long-lived assets during the years ended December 31, 2015, 2014 and 2013.
Other Direct Costs of Rental Operations	Other Direct Costs of Rental Operations Other direct costs of rental operations include direct labor, supplies, repairs, insurance, property taxes, license fees and certain modular lease costs charged to customers in the negotiated rental rate, which are recognized on a straight-line basis over the term of the lease.
Cost of Sales	Cost of Sales Cost of sales in the Consolidated Statements of Income includes the carrying value of the equipment sold and all direct costs associated with the sale.
Warranty Reserves	Warranty Reserves Sales of new relocatable modular buildings, portable storage containers, electronic test equipment and related accessories and liquid and solid containment tanks and boxes not manufactured by the Company are typically covered by warranties provided by the manufacturer of the products sold. The Company typically provides limited 90-day warranties for certain sales of used rental equipment and one-year warranties on equipment manufactured by Enviroplex. Although the Company’s policy is to provide reserves for warranties when required for specific circumstances, the Company has not found it necessary to establish such reserves to date as warranty costs have not been significant.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is recognized on a straight-line basis for financial reporting purposes, and on an accelerated basis for income tax purposes. Depreciation expenses for property, plant and equipment is included in “Selling and administrative expenses” and “Rental related services” in the Consolidated Statements of Income. Maintenance and repairs are expensed as incurred. Property, plant and equipment consist of the following: (dollar amounts in thousands) Estimated useful life December 31, in years 2015 2014 Land Indefinite $ 40,378 $ 38,455 Land improvements 20 – 50 42,004 39,715 Buildings 30 25,520 21,486 Furniture, office and computer equipment 3 – 10 34,053 32,544 Machinery and service equipment 5 – 20 28,642 24,454 170,597 156,654 Less accumulated depreciation (61,410 ) (53,503 ) 109,187 103,151 Construction in progress 566 5,477 $ 109,753 $ 108,628 Property, plant and equipment depreciation expense was $8.2 million, $7.6 million and $7.8 million for the years ended December 31, 2015, 2014 and 2013, respectively. Construction in progress at December 31, 2015 and 2014 consisted primarily of costs related to acquisition of land and land improvements.
Capitalized Software Costs	Capitalized Software Costs The Company capitalizes certain development costs incurred in connection with its internal use software. Costs incurred in the preliminary stages of development are expensed as incurred. Once an application has reached the development stage, direct internal and external costs are capitalized until the software is substantially complete and ready for its intended use. These costs generally include external direct costs of materials and services consumed in the project and internal costs, such as payroll and benefits of those employees directly associated with the development of the software. Maintenance and training costs are expensed as incurred. The Company also capitalizes costs related to specific upgrades and enhancements when it is probable the expenditures will result in additional functionality. Capitalized software costs are included in property, plant and equipment. The Company capitalized $0.6 million and $0.4 million in internal use software during the years ended December 31, 2015 and 2014, respectively.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred. Total advertising expenses were $2.8 million, $2.4 million and $2.4 million for the years ended December 31, 2015, 2014 and 2013.
Income Taxes	Income Taxes Income taxes are accounted for using an asset and liability approach. Deferred tax assets and liabilities are recorded for the effect of temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements. Deferred tax assets and deferred tax liabilities are adjusted to the extent necessary to reflect tax rates expected to be in effect when temporary differences reverse. Adjustments may be required to deferred tax assets and deferred tax liabilities due to changes in tax laws and audit adjustments by tax authorities. To the extent adjustments are required in any given period, the adjustments would be included within the tax provision in the Consolidated Statements of Income. The Company has not recorded a valuation allowance for its deferred tax assets. A valuation allowance would be established if, based on the weight of available evidence, management believes that it is more likely than not that some portion or all of a recorded deferred tax asset would not be realized in future periods.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Purchase prices of acquired businesses have been allocated to the assets and liabilities acquired based on the estimated fair values on the respective acquisition dates. Based on these values, the excess purchase prices over the fair value of the net assets acquired were allocated to goodwill and other intangible assets. Intangible assets related to customer relationships are amortized over eleven years. At December 31, 2015 and 2014, goodwill and trade name intangible assets which have indefinite lives totaled $33.5 million. 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 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 would be recognized as 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 impairment review of the Company’s goodwill and indefinite lived assets is performed by first assessing qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test. In the first step, the fair value of the reporting unit is compared to its carrying value to determine if the goodwill and intangible assets are impaired. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, then goodwill and intangible assets are not impaired and no further testing is required. If the carrying value of the net assets assigned to the reporting unit were to exceed its fair value, then the second step is performed in order to determine the implied fair value of the reporting unit’s goodwill and intangible assets and an impairment loss is recorded for an amount equal to the difference between the implied fair value and the carrying value of the goodwill and intangible assets. The Company conducted 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 years ended 2015, 2014 or 2013. Determining the fair value of a reporting unit is judgmental 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.
Earnings Per Share	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 effects of stock options, unvested restricted stock awards and other potentially dilutive securities. The table below presents the weighted-average common stock used to calculate basic and diluted earnings per share: (in thousands) Year Ended December 31, 2015 2014 2013 Weighted-average common stock for calculating basic earnings per share 25,369 25,914 25,433 Effect of potentially dilutive securities from equity-based compensation 88 261 493 Weighted-average common stock for calculating diluted earnings per share 25,457 26,175 25,926 The following securities were not included in the computation of diluted earnings per share as their effect would have been anti-dilutive: (in thousands) Year Ended December 31, 2015 2014 2013 Options to purchase common stock 746 9 20 In May 2008, the Company’s Board of Directors authorized the Company to repurchase an aggregate of 2,000,000 shares of the Company's outstanding common stock. The Company has in the past made purchases of shares of its common stock from time to time in over-the-counter market (NASDAQ) transactions, through privately negotiated, large block transactions and through a share repurchase plan, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934. In August 2015, the Company’s Board of Directors authorized the Company to repurchase an additional 2,000,000 shares of the Company's outstanding common stock. The amount and time of the specific repurchases are subject to prevailing market conditions, applicable legal requirements and other factors, including management’s discretion. All shares repurchased by the Company are canceled and returned to the status of authorized but unissued shares of common stock. There can be no assurance that any authorized shares will be repurchased and the repurchase program may be modified, extended or terminated by the board of directors at any time. The following table presents share repurchase activities during the years ended December 31, 2015 and 2014: Year ended December 31 (in thousands, except share and per share amounts) 2015 2014 Number of shares repurchased 2,407,974 — Aggregate purchase price $ 63,953 — Average price per repurchased shares $ 26.56 — As of December 31, 2015, 1,592,026 shares remain authorized for repurchase.
Accounts Receivable and Concentration of Credit Risk	Accounts Receivable and Concentration of Credit Risk The Company’s accounts receivable consist of amounts due from customers for rentals, sales, financed sales and unbilled amounts for the portion of modular building end-of-lease services earned, which were negotiated as part of the lease agreement. Unbilled receivables related to end-of-lease services, which consists of dismantle and return delivery of buildings, were $25.0 million at December 31, 2015 and $21.1 million at December 31, 2014. The Company sells primarily on 30-day terms, individually performs credit evaluation procedures on its customers on each transaction and will require security deposits from its customers when a significant credit risk is identified. The Company records an allowance for doubtful accounts in amounts equal to the estimated losses expected to be incurred in the collection of the accounts receivable. The estimated losses are based on historical collection experience in conjunction with an evaluation of the current status of the existing accounts. Customer accounts are written off against the allowance for doubtful accounts when an account is determined to be uncollectable. The allowance for doubtful accounts activity was as follows: (in thousands) 2015 2014 Beginning balance, January 1 $ 2,038 $ 2,007 Provision for doubtful accounts 2,149 1,825 Write-offs, net of recoveries (2,100 ) (1,794 ) Ending balance, December 31 $ 2,087 $ 2,038 Financial instruments that potentially subject the Company to concentration of credit risk consist primarily of trade accounts receivable. From time to time, the Company maintains cash balances in excess of the Federal Deposit Insurance Corporation limits.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company believes that the carrying amounts for cash, accounts receivable, accounts payable and notes payable approximate their fair values except for fixed rate debt included in notes payable which has an estimated fair value of $160.6 million and $122.9 million compared to the recorded value of $160.0 million and $120.0 million as of December 31, 2015 and 2014, respectively. The estimates of fair value of the Company’s fixed rate debt are based on the borrowing rates currently available to the Company for bank loans with similar terms and average maturities.
Foreign Currency Transactions and Translation	Foreign Currency Transactions and Translation The Company's Canadian subsidiary, TRS-RenTelco Inc., a British Columbia corporation (“TRS-Canada”), functions as a branch sales office for TRS-RenTelco in Canada. The functional currency for TRS-Canada is the U.S. dollar. Foreign currency transaction gains and losses of TRS-Canada are reported in the results of operations in the period in which they occur. The Company’s Indian subsidiary, TRS-RenTelco India Private Limited (“TRS-India”), functions as a rental and sales office for TRS-RenTelco in India. The functional currency for TRS-India is the Indian Rupee. All assets and liabilities of TRS-India are translated into U.S. dollars at period-end exchange rates and all income statement amounts are translated at the average exchange rate for each month within the year. Currently, the Company does not use derivative instruments to hedge its economic exposure with respect to assets, liabilities and firm commitments as the foreign currency transactions and risks to date have not been significant.
Share-Based Compensation	Share-Based Compensation The Company measures and recognizes the compensation expense for all share-based awards made to employees and directors, including stock options, stock appreciation rights (“SARs”) and restricted stock units (“RSUs”), based upon estimated fair values. The fair value of stock options and SARs is estimated on the date of grant using the Black-Scholes option pricing model and for RSUs based upon the fair market value of the underlying shares of common stock as of the date of grant. The Company recognizes share-based compensation cost ratably on a straight-line basis over the requisite service period, which generally equals the vesting period. For performance-based RSUs, compensation costs are recognized when vesting conditions are met. In addition, the Company estimates the probable number of shares of common stock that will be earned and the corresponding compensation cost until the achievement of the performance goal is known. The Company records share-based compensation costs in “Selling and administrative expenses” in the Consolidated Statements of Income. The Company recognizes a benefit from share-based compensation in the Consolidated Statements of Shareholders’ Equity if an incremental tax benefit is realized. Further information regarding share-based compensation can be found in “Note 5 –Benefit Plans”.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions in determining reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during each period presented. Actual results could differ from those estimates. The most significant estimates included in the financial statements are the future cash flows and fair values used to determine the recoverability of the rental equipment and identifiable definite lived intangible assets carrying value, the various assets’ useful lives and residual values, and the allowance for doubtful accounts.
New Accounting Pronouncements	New Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers. The objective of this guidance is to establish the principles to report useful information to users of financial statements about the nature, timing and uncertainty of revenue from contracts with customers. In August 2015, the FASB issued an update to defer the effective date of this guidance by one year. The guidance in the update is effective for the interim and annual reporting periods beginning after December 15, 2017. The Company is currently evaluating the impact of the adoption of this accounting guidance on its consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-03, Imputation of Interest (Subtopic 835-30). The amendments in this update require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with the presentation of debt discounts. The guidance in this update does not address presentation or subsequent measurement of debt issuance cost related to line-of-credit arrangements. In August of 2015, the FASB issued ASU No. 2015-15, Imputation of Interest (Subtopic 835-30), to add SEC paragraphs pursuant to the SEC Staff Announcement that the SEC Staff would not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance cost ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The amendments are effective for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The application of this guidance will result in a reclassification of debt financing costs from prepaid expenses and other assets to a reduction of the specific debt liability, and will not affect the Company’s statement of operations or cash flows. In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805). The ASU No. 2015-16 requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendment requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed on the acquisition date. The amendment requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The provisions of the ASU No. 2015-16 are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The Company does not expect the adoption of this accounting guidance to have a significant impact on its consolidated financial statements.
Income Tax Position	The Company recognizes the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not threshold, the amount recognized in the financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority.
Segment Reporting	FASB guidelines establish annual and interim reporting standards for an enterprise’s operating segments and related disclosures about its products, services, geographic areas and major customers. In accordance with these guidelines the Company’s four reportable segments are Mobile Modular, TRS-RenTelco, Adler Tanks and Enviroplex. Management focuses on several key measures to evaluate and assess each segment’s performance including rental revenue growth, gross margin, 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 amongst Mobile Modular, TRS-RenTelco and Adler Tanks based on their pro-rata share of average rental equipment at cost, goodwill, intangible assets, accounts receivable, deferred income and customer security deposits. The Company does not report total assets by business segment.

Summary of Significant Accoun22

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Estimated Useful Lives and Residual Values of Company's Rental Equipment	The estimated useful lives and residual values of the Company’s rental equipment used for financial reporting purposes are as follows: Relocatable modular buildings 18 years, 50% residual value Relocatable modular accessories 3 to 18 years, no residual value Portable storage containers 25 years, 62.5% residual value Electronic test equipment and accessories 1 to 8 years, no residual value Liquid and solid containment tanks and boxes and accessories 10 to 20 years, no residual value
Property, Plant and Equipment	Property, plant and equipment consist of the following: (dollar amounts in thousands) Estimated useful life December 31, in years 2015 2014 Land Indefinite $ 40,378 $ 38,455 Land improvements 20 – 50 42,004 39,715 Buildings 30 25,520 21,486 Furniture, office and computer equipment 3 – 10 34,053 32,544 Machinery and service equipment 5 – 20 28,642 24,454 170,597 156,654 Less accumulated depreciation (61,410 ) (53,503 ) 109,187 103,151 Construction in progress 566 5,477 $ 109,753 $ 108,628
Weighted-Average Common Stock Used to Calculate Basic and Diluted Earnings per Share	The table below presents the weighted-average common stock used to calculate basic and diluted earnings per share: (in thousands) Year Ended December 31, 2015 2014 2013 Weighted-average common stock for calculating basic earnings per share 25,369 25,914 25,433 Effect of potentially dilutive securities from equity-based compensation 88 261 493 Weighted-average common stock for calculating diluted earnings per share 25,457 26,175 25,926
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: (in thousands) Year Ended December 31, 2015 2014 2013 Options to purchase common stock 746 9 20
Summary of Share Repurchase Activities	The following table presents share repurchase activities during the years ended December 31, 2015 and 2014: Year ended December 31 (in thousands, except share and per share amounts) 2015 2014 Number of shares repurchased 2,407,974 — Aggregate purchase price $ 63,953 — Average price per repurchased shares $ 26.56 —
Summary of Allowance for Doubtful Accounts Activity	The allowance for doubtful accounts activity was as follows: (in thousands) 2015 2014 Beginning balance, January 1 $ 2,038 $ 2,007 Provision for doubtful accounts 2,149 1,825 Write-offs, net of recoveries (2,100 ) (1,794 ) Ending balance, December 31 $ 2,087 $ 2,038

Financed Lease Receivables (Tab

Financed Lease Receivables (Tables)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Minimum Lease Payments Receivable and Net Investment Included in Accounts Receivable for Leases	The minimum lease payments receivable and the net investment included in accounts receivable for such leases are as follows: (in thousands) December 31, 2015 2014 Gross minimum lease payments receivable $ 2,745 $ 3,489 Less – unearned interest (175 ) (188 ) Net investment in sales type lease receivables $ 2,570 $ 3,301
Future Minimum Lease Payments under Non-Cancelable Sales-Type Leases	As of December 31, 2015, the future minimum lease payments under non-cancelable sales-type leases to be received in 2016 and thereafter are as follows: (in thousands) Year Ended December 31, 2016 $ 1,558 2017 1,173 2018 14 2019 — Total minimum future lease payments $ 2,745

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Components of Notes Payable	Notes payable consists of the following: (in thousands) December 31, 2015 2014 Unsecured revolving lines of credit $ 221,441 $ 202,478 4.03% Series A senior notes due in 2018 60,000 80,000 3.68% Series B senior notes due in 2021 40,000 40,000 3.84% Series C senior notes due in 2022 60,000 — $ 381,441 $ 322,478
Schedule of Future Minimum Payments under Unsecured Revolving Lines of Credit and 4.03% Senior Notes, 3.68% Senior Notes and 3.84% Senior Notes	As of December 31, 2015, the future minimum payments under the unsecured revolving lines of credit, 4.03% Series A senior notes due in 2018, 3.68% Series B senior notes due in 2021 and 3.84% Series C senior notes due in 2022 are as follows: (in thousands) Year Ended December 31, 2016 $ 20,000 2017 241,441 2018 20,000 2019 — 2020 — 2021 and thereafter 100,000 $ 381,441
Schedule of Information Related to Lines of Credit	The following information relates to the lines of credit for each of the following periods: (dollar amounts in thousands) Year Ended December 31, 2015 2014 Maximum amount outstanding $ 295,588 $ 208,894 Average amount outstanding $ 236,860 $ 191,248 Weighted average interest rate, during the period 2.35 % 2.41 % Prime interest rate, end of period 3.50 % 3.25 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Schedule of Income Before Provision For Income Taxes	Income before provision for income taxes consisted of the following: (in thousands) Year Ended December 31, 2015 2014 2013 U.S. $ 66,889 $ 76,848 $ 71,678 Foreign (512 ) (287 ) (304 ) $ 66,377 $ 76,561 $ 71,374
Provision for Income Taxes	The provision for income taxes consisted of the following: (in thousands) Year Ended December 31, 2015 2014 2013 Current: U.S. Federal $ 7,976 $ 7,494 $ 1,188 State 1,851 2,139 1,803 Foreign 1,645 1,572 2,217 11,472 11,205 5,208 Deferred: U.S. Federal 13,201 17,986 21,067 State 1,538 1,927 1,818 Foreign (304 ) (266 ) (116 ) 14,435 19,647 22,769 Total $ 25,907 $ 30,852 $ 27,977
Reconciliation of U.S. Federal Statutory Tax Rate to Company's Effective Tax Rate	The reconciliation of the U.S. federal statutory tax rate to the Company’s effective tax rate is as follows: Year Ended December 31, 2015 2014 2013 U.S. federal statutory rate 35.0 % 35.0 % 35.0 % State taxes, net of federal benefit 4.2 4.1 4.1 Other (0.2 ) 1.2 0.1 39.0 % 40.3 % 39.2 %
Deferred Income Taxes Related to Temporary Differences between Tax Bases of Assets and Liabilities	The following table shows the deferred income taxes related to the temporary differences between the tax bases of assets and liabilities and the respective amounts included in “Deferred income taxes, net” on the Company’s Consolidated Balance Sheets: (in thousands) December 31, 2015 2014 Deferred tax liabilities: Accelerated depreciation $ 286,618 $ 272,496 Prepaid costs currently deductible 6,997 6,358 Other 5,034 4,404 Total deferred tax liabilities 298,649 283,258 Deferred tax assets: Accrued costs not yet deductible 8,638 7,463 Allowance for doubtful accounts 804 788 Net operating loss carry forwards and credits 577 302 Deferred revenues 1,945 1,132 Share-based compensation 3,334 4,671 Total deferred tax assets 15,298 14,356 Deferred income taxes, net $ 283,351 $ 268,902

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Company's Option Activity	A summary of the Company’s option activity and related information for the three years ended December 31, 2015 is as follows: Number of options Weighted- average price Weighted- average remaining contractual term (in years) Aggregate intrinsic value (in millions) Balance at December 31, 2012 2,838,553 $ 24.37 Options granted 192,800 29.14 Options exercised (1,237,341) 24.71 Options cancelled/forfeited/expired (21,950 ) 25.20 Balance at December 31, 2013 1,772,062 24.68 Options granted 203,600 32.79 Options exercised (612,682) 21.55 Options cancelled/forfeited/expired (19,220 ) 30.35 Balance at December 31, 2014 1,343,760 27.25 Options granted 456,200 31.69 Options exercised (270,650 ) 19.81 Options cancelled/forfeited/expired (118,660 ) 29.58 Balance at December 31, 2015 1,410,650 $ 29.91 3.82 $ (6.6 ) Exercisable at December 31, 2015 662,345 $ 27.53 1.89 $ (1.5 ) Expected to vest after December 31, 2015 673,475 $ 31.64 5.53 $ (4.3 )
Options Outstanding and Options Exercisable by Exercise Price with Weighted-Average Remaining Contractual Life for Options Outstanding and Weighted-Average Exercise Price	The following table indicates the options outstanding and options exercisable by exercise price with the weighted-average remaining contractual life for the options outstanding and the weighted-average exercise price at December 31, 2015: Options Outstanding Options Exercisable Exercise price Number outstanding at December Weighted- average remaining contractual life (Years) Weighted- average grant date value Number exercisable at December 31, 2015 Weighted- average grant date value $15 – 20 2,400 0.17 $ 15.62 2,400 $ 15.62 20 – 25 153,855 1.22 23.86 151,965 23.86 25 – 30 508,795 2.04 28.98 424,960 29.01 30 – 35 736,200 5.59 32.04 79,480 32.62 35 – 40 9,400 4.96 37.83 3,540 37.90 $15 – 40 1,410,650 3.82 $ 29.91 662,345 $ 27.53
Schedule of Weighted-Average Assumptions Used to Determine Fair Value of Option Granted	The fair value of each option granted was estimated on the date of grant using the Black-Scholes option-pricing model using the following weighted-average assumptions: Year Ended December 31, 2015 2014 2013 Expected term (in years) 5.0 5.0 5.0 Expected volatility 31.1 % 40.5 % 50.3 % Expected dividend yields 3.2 % 3.0 % 3.3 % Risk-free interest rates 1.6 % 1.5 % 0.8 %
Summary of Company's Restricted Stock Units Activity	The following table summarizes the activity of the Company’s RSUs, which includes service-based and performance-based awards, for the three years ended December 31, 2015: Weighted- Aggregate average intrinsic Number grant Date value of shares fair value (in millions) Balance at December 31, 2012 262,820 28.22 RSUs granted 150,300 26.89 RSUs vested (87,840 ) 24.98 RSUs cancelled/forfeited/expired (4,300 ) 29.24 Balance at December 31, 2013 320,980 28.47 RSUs granted 118,864 30.85 RSUs vested (120,721 ) 27.30 RSUs cancelled/forfeited/expired (7,540 ) 30.34 Balance at December 31, 2014 311,583 29.78 RSUs granted 79,300 31.86 RSUs vested (89,915 ) 27.97 RSUs cancelled/forfeited/expired (80,320 ) 31.35 Balance at December 31, 2015 220,648 $ 30.70 $ 5.6

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Minimum Payments under Leases, Exclusive of Property Taxes and Insurance	Minimum payments under these leases, exclusive of property taxes and insurance, are as follows: (in thousands) Year Ended December 31, 2016 $ 1,269 2017 874 2018 709 Thereafter — $ 2,852

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	Intangible assets consist of the following: (dollar amounts in thousands) Estimated useful life December 31, (In years) 2015 2014 Trade name Indefinite $ 5,700 $ 5,700 Customer relationships 11 9,611 9,611 15,311 15,311 Less accumulated amortization (5,846 ) (4,975 ) $ 9,465 $ 10,336

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Summarized Financial Information for Company's Reportable Segments	Summarized financial information for the years ended December 31, 2015, 2014 and 2013, 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, 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 operation 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) 53,796 21,784 17,955 1,728 95,263 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 % Segment Data (Continued) (dollar amounts in thousands) Mobile Modular TRS- RenTelco Adler Tanks Enviroplex 1 Consolidated Year Ended December 31, 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 operation 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) 46,797 28,849 21,031 4,617 101,294 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 % 2013 Rental revenues $ 82,503 $ 102,101 $ 71,162 $ — $ 255,766 Rental related services revenues 28,891 3,095 21,162 — 53,148 Sales and other revenues 21,267 29,857 1,616 17,855 70,595 Total revenues 132,661 135,053 93,940 17,855 379,509 Depreciation of rental equipment 14,459 39,953 13,796 — 68,208 Gross profit 50,423 63,520 51,076 3,996 169,015 Selling and administrative expenses 36,488 24,542 24,644 3,091 88,765 Income from operation 13,935 38,978 26,432 905 80,250 Interest expense (income) allocation 4,318 2,156 2,419 (206 ) 8,687 Income before provision for income taxes 9,617 36,633 24,013 1,111 71,374 Rental equipment acquisitions 52,953 52,625 31,023 — 136,601 Accounts receivable, net (period end) 37,163 27,328 21,915 1,244 87,650 Rental equipment, at cost (period end) 592,391 267,772 284,005 — 1,144,168 Rental equipment, net book value (period end) 415,366 109,988 241,656 — 767,010 Utilization (period end) 2 70.7 % 58.2 % 57.7 % Average utilization 2 68.3 % 62.7 % 64.2 % 1 Gross Enviroplex sales revenues were $11,530, $19,017 and $17,859 in 2015, 2014 and 2013, respectively, which includes inter-segment sales to Mobile Modular of $918, $1,560 and $4, 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.

Quarterly Financial Informati30

Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarterly financial information for each of the two years ended December 31, 2015 is summarized below: (in thousands, except per share amounts) 2015 First Second Third Fourth Year Operations Data Rental revenues $ 65,502 $ 67,305 $ 70,195 $ 70,694 $ 273,696 Total revenues 90,188 96,026 113,048 105,282 404,544 Gross profit 39,087 40,918 50,146 46,756 176,907 Income from operations 13,875 16,465 25,150 21,467 76,957 Income before provision for income taxes 11,316 14,033 22,505 18,523 66,377 Net income 6,846 8,490 13,616 11,518 40,470 Earnings per share: Basic $ 0.26 $ 0.33 $ 0.54 $ 0.48 $ 1.60 Diluted $ 0.26 $ 0.32 $ 0.54 $ 0.48 $ 1.59 Dividends declared per share $ 0.250 $ 0.250 $ 0.250 $ 0.250 $ 1.00 Shares used in per share calculations: Basic 26,091 26,142 25,334 23,932 25,369 Diluted 26,276 26,273 25,408 24,015 25,457 Balance Sheet Data Rental equipment, net $ 839,078 $ 856,489 $ 864,277 $ 869,601 $ 869,601 Total assets 1,112,056 1,132,750 1,149,095 1,152,709 1,152,709 Notes payable 320,923 337,177 382,113 381,441 381,441 Shareholders’ equity 425,848 426,823 389,464 379,687 379,687 2014 First Second Third Fourth Year Operations Data Rental revenues $ 62,430 $ 65,809 $ 69,642 $ 71,694 $ 269,575 Total revenues 87,560 95,745 113,025 111,792 408,122 Gross profit 38,638 42,079 49,298 52,204 182,219 Income from operations 15,227 18,239 25,098 26,796 85,360 Income before provision for income taxes 12,936 16,794 22,609 24,222 76,561 Net income 7,871 10,205 13,746 13,887 45,709 Earnings per share: Basic $ 0.31 $ 0.39 $ 0.53 $ 0.54 $ 1.77 Diluted $ 0.30 $ 0.39 $ 0.53 $ 0.53 $ 1.75 Dividends declared per share $ 0.245 $ 0.245 $ 0.245 $ 0.245 $ 0.98 Shares used in per share calculations: Basic 25,789 25,912 25,953 25,999 25,914 Diluted 26,230 26,220 26,152 26,206 26,175 Balance Sheet Data Rental equipment, net $ 775,875 $ 795,532 $ 817,898 $ 825,750 $ 825,750 Total assets 1,021,613 1,051,764 1,089,130 1,116,407 1,116,407 Notes payable 288,081 307,000 322,280 322,478 322,478 Shareholders’ equity 401,563 406,439 414,519 424,531 424,531

Summary of Significant Accoun31

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)DivisionSegmentshares	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Aug. 31, 2015shares	May. 31, 2008shares
Accounting Policies [Abstract]
Number of divisions | Division	4
Number of reportable segments | Segment	4
Impairments of long-lived assets	$ 0	$ 0	$ 0
Period for warranties for rental equipment	90 days
Period for warranties for equipment manufactured	1 year
Property, plant and equipment depreciation expenses	$ 8,200,000	7,600,000	7,800,000
Capitalized in internal use of software	600,000	400,000
Total advertising expenses	2,800,000	2,400,000	2,400,000
Deferred tax assets, valuation allowance	$ 0
Estimated useful life (In years), Customer relationships	11 years
Goodwill and trade name intangible assets	$ 33,500,000	33,500,000
Goodwill and intangible assets impairment charge	$ 0	0	$ 0
Common stock shares authorized for repurchase | shares				2,000,000	2,000,000
Shares remain authorized for repurchase | shares	1,592,026
Unbilled receivables related to end-of-lease services	$ 25,000,000	21,100,000
Period for credit risk identified	30 days
Estimated fair value notes payable	$ 160,600,000	122,900,000
Recorded fair value of notes payable	$ 160,000,000	$ 120,000,000

Summary of Significant Accoun32

Summary of Significant Accounting Policies - Estimated Useful Lives and Residual Values of Company's Rental Equipment (Detail)	12 Months Ended
	Dec. 31, 2015
Relocatable modular buildings [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	18 years
Percentage residual value property subject to or available for operating lease	50.00%
Relocatable modular accessories [Member]
Property, Plant and Equipment [Line Items]
Percentage residual value property subject to or available for operating lease	0.00%
Portable storage containers [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	25 years
Percentage residual value property subject to or available for operating lease	62.50%
Electronic test equipment and accessories [Member]
Property, Plant and Equipment [Line Items]
Percentage residual value property subject to or available for operating lease	0.00%
Liquid and solid containment tanks and boxes and accessories [Member]
Property, Plant and Equipment [Line Items]
Percentage residual value property subject to or available for operating lease	0.00%
Minimum [Member] | Relocatable modular accessories [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	3 years
Minimum [Member] | Electronic test equipment and accessories [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	1 year
Minimum [Member] | Liquid and solid containment tanks and boxes and accessories [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	10 years
Maximum [Member] | Relocatable modular accessories [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	18 years
Maximum [Member] | Electronic test equipment and accessories [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	8 years
Maximum [Member] | Liquid and solid containment tanks and boxes and accessories [Member]
Property, Plant and Equipment [Line Items]
Property subject to or available for operating lease useful life	20 years

Summary of Significant Accoun33

Summary of Significant Accounting Policies - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 170,597	$ 156,654
Less Accumulated Depreciation	(61,410)	(53,503)
Property plant and equipment net excluding capitalized cost	109,187	103,151
Construction In Progress	566	5,477
Property, Plant and Equipment, net	109,753	108,628
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 40,378	38,455
Estimated useful life	Indefinite
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 42,004	39,715
Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	50 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 25,520	21,486
Estimated useful life	30 years
Furniture, Office and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34,053	32,544
Furniture, Office and Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, Office and Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Machinery and Service Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 28,642	$ 24,454
Machinery and Service Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Machinery and Service Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years

Summary of Significant Accoun34

Summary of Significant Accounting Policies - Weighted-Average Common Stock Used to Calculate Basic and Diluted Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Weighted-average common stock for calculating basic earnings per share	23,932	25,334	26,142	26,091	25,999	25,953	25,912	25,789	25,369	25,914	25,433
Effect of potentially dilutive securities from equity-based compensation									88	261	493
Weighted-average common stock for calculating diluted earnings per share	24,015	25,408	26,273	26,276	26,206	26,152	26,220	26,230	25,457	26,175	25,926

Summary of Significant Accoun35

Summary of Significant Accounting Policies - Securities Not Included in Computation of Diluted Earnings Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Options to purchase common stock	746	9	20

Summary of Significant Accoun36

Summary of Significant Accounting Policies - Summary of Share Repurchase Activities (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Number of shares repurchased	2,407,974	0
Aggregate purchase price	$ 63,953
Average price per repurchased shares	$ 26.56

Summary of Significant Accoun37

Summary of Significant Accounting Policies - Summary of Allowance for Doubtful Accounts Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Allowance for doubtful accounts, Beginning Balance	$ 2,038	$ 2,007
Provision for doubtful accounts	2,149	1,825	$ 2,144
Write-offs, net of recoveries	(2,100)	(1,794)
Allowance for doubtful accounts, Ending Balance	$ 2,087	$ 2,038	$ 2,007

Financed Lease Receivables - Mi

Financed Lease Receivables - Minimum Lease Payments Receivable and Net Investment Included in Accounts Receivable for Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Minimum lease payments receivable and net investment included in accounts receivable for leases
Gross minimum lease payments receivable	$ 2,745	$ 3,489
Less – unearned interest	(175)	(188)
Net investment in sales type lease receivables	$ 2,570	$ 3,301

Financed Lease Receivables - Fu

Financed Lease Receivables - Future Minimum Lease Payments under Non-Cancelable Sales-Type Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Future minimum lease payments under non-cancelable sales-type leases
2,016	$ 1,558
2,017	1,173
2,018	14
2,019	0
Total minimum future lease payments	$ 2,745	$ 3,489

Notes Payable - Components of N

Notes Payable - Components of Notes Payable (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Debt Instrument [Line Items]
Notes payable	$ 381,441	$ 382,113	$ 337,177	$ 320,923	$ 322,478	$ 322,280	$ 307,000	$ 288,081
Unsecured Revolving Lines of Credit [Member]
Debt Instrument [Line Items]
Notes payable	221,441				202,478
Series A senior notes [Member] | 4.03% Series A senior notes due in 2018 [Member]
Debt Instrument [Line Items]
Notes payable	60,000				80,000
Series B Senior Notes | 3.68% Series B senior notes due in 2021 [Member]
Debt Instrument [Line Items]
Notes payable	40,000				$ 40,000
Series C Senior Notes | 3.84% Series C senior notes due in 2022 [Member]
Debt Instrument [Line Items]
Notes payable	$ 60,000

Notes Payable - Components of41

Notes Payable - Components of Notes Payable (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2015	Nov. 05, 2015	Mar. 17, 2014	Apr. 21, 2011
Series A senior notes [Member] | 4.03% Series A senior notes due in 2018 [Member]
Debt Instrument [Line Items]
Senior Notes, interest rate	4.03%			4.03%
Senior Notes, year of maturity	2,018
Series B Senior Notes | 3.68% Series B senior notes due in 2021 [Member]
Debt Instrument [Line Items]
Senior Notes, interest rate	3.68%		3.68%
Senior Notes, year of maturity	2,021
Series C Senior Notes | 3.84% Series C senior notes due in 2022 [Member]
Debt Instrument [Line Items]
Senior Notes, interest rate	3.84%	3.84%
Senior Notes, year of maturity	2,022

Notes Payable - Schedule of Fut

Notes Payable - Schedule of Future Minimum Payments under Unsecured Revolving Lines of Credit and 4.03% Senior Notes, 3.68% Senior Notes and 3.84% Senior Notes (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Debt Instrument [Line Items]
Notes payable	$ 381,441	$ 382,113	$ 337,177	$ 320,923	$ 322,478	$ 322,280	$ 307,000	$ 288,081
Notes Payable to Banks and Others [Member]
Debt Instrument [Line Items]
2,016	20,000
2,017	241,441
2,018	20,000
2021 and thereafter	100,000
Notes payable	$ 381,441

Notes Payable - Additional Info

Notes Payable - Additional Information (Detail) - USD ($)	Nov. 05, 2015	Mar. 17, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2012	Apr. 21, 2011
Debt Instrument [Line Items]
Consolidated Fixed Charge Coverage Ratio			2.50%
Consolidated Fixed Charge Coverage Ratio, actual			3.85%
Consolidated Leverage Ratio			2.75%
Consolidated Leverage Ratio, actual			2.32%
Line of credit facility covenants tangible net worth description			Permit Tangible Net Worth, calculated as of the last day of each fiscal quarter, to be less than the sum of (i) $229.0 million, plus (ii) 25% of net income for such fiscal quarter subsequent to December 31, 2010, plus (iii) 90% of the net cash proceeds from the issuance of the Company’s capital stock after December 31, 2010.
Tangible Net Worth sum			$ 304,900,000
Consolidated Net Income			25.00%
Percentage of net cash proceeds from issuance of capital stock			90.00%
Actual tangible net worth			$ 342,400,000
Series A senior notes [Member] | 4.03% Series A senior notes due in 2018 [Member]
Debt Instrument [Line Items]
Aggregate principal amount						$ 100,000,000
Senior notes interest rate			4.03%			4.03%
Debt instrument, payment terms			Interest on these notes is due semi-annually in arrears and the principal is due in five equal annual installments, with the first payment due on April 21, 2014.
Debt instrument, maturity date			Apr. 21, 2018
Debt instrument, date of first required payment			Apr. 21, 2014
Senior notes principal balance outstanding			$ 60,000,000	$ 80,000,000
Series B Senior Notes | 3.68% Series B senior notes due in 2021 [Member]
Debt Instrument [Line Items]
Senior notes interest rate		3.68%	3.68%
Debt instrument, maturity date			Mar. 17, 2021
Senior notes principal balance outstanding			$ 40,000,000
Proceeds from issuance of senior notes		$ 40,000,000
Senior notes description			The Series B Senior Notes are an unsecured obligation of the Company, bear interest at a rate of 3.68% per annum and mature on March 17, 2021. Interest on the Series B Senior Notes is payable semi-annually beginning on September 17, 2014 and continuing thereafter on March 17 and September 17 of each year until maturity.
Senior notes interest payment			Semi-annually
Series C Senior Notes | 3.84% Series C senior notes due in 2022 [Member]
Debt Instrument [Line Items]
Senior notes interest rate	3.84%		3.84%
Debt instrument, payment terms			Interest on the Series C Senior Notes is payable semi-annually beginning on May 5, 2016 and continuing thereafter on November 5 and May 5 of each year until maturity.
Debt instrument, maturity date			Nov. 5, 2022
Debt instrument, date of first required payment			May 5, 2016
Senior notes principal balance outstanding			$ 60,000,000
Proceeds from issuance of senior notes	$ 60,000,000
Senior notes interest payment			Semi-annually
Minimum [Member]
Debt Instrument [Line Items]
Tangible Net Worth sum			$ 229,000,000
Amended Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, maturity period			5 years
Revolving credit facility, maturity date			Jun. 15, 2017
Credit facility, maximum			$ 420,000,000
Revolving credit facility, available maximum borrowing capacity			450,000,000
Additional commitments			30,000,000
Amount outstanding			$ 218,000,000	$ 200,000,000
Consolidated Fixed Charge Coverage Ratio			2.50%
Consolidated Fixed Charge Coverage Ratio, actual			3.85%
Consolidated Leverage Ratio			2.32%
Consolidated Leverage Ratio, actual			2.75%
Line of credit facility covenants tangible net worth description			Permit Tangible Net Worth as of the end of any fiscal quarter of the Company to be less than the sum of (i) $246.1 million plus (ii) 25% of the Company’s Consolidated Net Income (as defined in the Amended Credit Facility) (but only if a positive number) for each fiscal quarter ended subsequent to December 31, 2011
Tangible Net Worth sum			$ 304,900,000
Consolidated Net Income			25.00%
Percentage of net cash proceeds from issuance of capital stock			90.00%
Actual tangible net worth			$ 342,400,000
Debt instrument description of variable rate basis			(i) LIBOR plus a defined margin, or (ii) the Agent bank’s prime rate (“base rate”) plus a margin. The applicable margin for each type of loan is measured based upon the Consolidated Leverage Ratio at the end of the prior fiscal quarter and ranges from 1.00% to 1.75% for LIBOR loans and 0% to 0.75% for base rate loans. In addition, the Company pays an unused commitment fee for the portion of the $420.0 million credit facility that is not used. These fees are based upon the Consolidated Leverage Ratio and range from 0.15% to 0.30%. As of December 31, 2015 and 2014, the applicable margins were 1.75% and 1.50% for LIBOR based loans, respectively, 0.75% and 0.50% for base rate loans, respectively and 0.30% and 0.25% for unused fees, respectively. Amounts borrowed under the Sweep Service Facility are based upon the MUFG Union Bank, N.A. base rate plus an applicable margin and an unused commitment fee for the portion of the $10.0 million facility not used.
Unused commitment fees			$ 420,000,000
Amended Credit Facility [Member] | Unused Fees [Member]
Debt Instrument [Line Items]
Debt instrument interest rate at period end			0.30%	0.25%
Amended Credit Facility [Member] | LIBOR Loans [Member]
Debt Instrument [Line Items]
Debt instrument interest rate at period end			1.75%	1.50%
Amended Credit Facility [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Debt instrument interest rate at period end			0.75%	0.50%
Amended Credit Facility [Member] | Sweep Service Facility [Member]
Debt Instrument [Line Items]
Credit facility, maximum			$ 430,000,000
Revolving credit facility, available maximum borrowing capacity			208,600,000
Amount outstanding			221,400,000
Unused commitment fees			10,000,000
Amended Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Tangible Net Worth sum			$ 246,100,000
Leverage ratio			0.15%
Amended Credit Facility [Member] | Minimum [Member] | LIBOR Loans [Member]
Debt Instrument [Line Items]
Leverage ratio			1.00%
Amended Credit Facility [Member] | Minimum [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Leverage ratio			0.00%
Amended Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio			0.30%
Amended Credit Facility [Member] | Maximum [Member] | LIBOR Loans [Member]
Debt Instrument [Line Items]
Leverage ratio			1.75%
Amended Credit Facility [Member] | Maximum [Member] | Base Rate Loans [Member]
Debt Instrument [Line Items]
Leverage ratio			0.75%
Unsecured revolving credit facility before Amendment [Member]
Debt Instrument [Line Items]
Credit facility, maximum			$ 350,000,000
Letters of Credit [Member]
Debt Instrument [Line Items]
Credit facility, maximum			25,000,000
Letters of Credit [Member] | Sweep Service Facility [Member]
Debt Instrument [Line Items]
Amount outstanding			3,400,000	$ 2,500,000
Letters of Credit [Member] | Minimum [Member]
Debt Instrument [Line Items]
Credit facility, maximum					$ 5,000,000
Letters of Credit [Member] | Maximum [Member]
Debt Instrument [Line Items]
Credit facility, maximum					$ 10,000,000
Swingline Loans [Member]
Debt Instrument [Line Items]
Credit facility, maximum			$ 10,000,000

Notes Payable - Schedule of Inf

Notes Payable - Schedule of Information Related to Lines of Credit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Maximum amount outstanding	$ 295,588	$ 208,894
Average amount outstanding	$ 236,860	$ 191,248
Weighted average interest rate, during the period	2.35%	2.41%
Prime interest rate, end of period	3.50%	3.25%

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Before Provision For Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest [Abstract]
U.S.									$ 66,889	$ 76,848	$ 71,678
Foreign									(512)	(287)	(304)
Income before provision for income taxes	$ 18,523	$ 22,505	$ 14,033	$ 11,316	$ 24,222	$ 22,609	$ 16,794	$ 12,936	$ 66,377	$ 76,561	$ 71,374

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
U.S. Federal	$ 7,976	$ 7,494	$ 1,188
State	1,851	2,139	1,803
Foreign	1,645	1,572	2,217
Current income tax expense (benefit)	11,472	11,205	5,208
Deferred:
U.S. Federal	13,201	17,986	21,067
State	1,538	1,927	1,818
Foreign	(304)	(266)	(116)
Deferred income tax expense (benefit)	14,435	19,647	22,769
Total	$ 25,907	$ 30,852	$ 27,977

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of U.S. Federal Statutory Tax Rate to Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	4.20%	4.10%	4.10%
Other	(0.20%)	1.20%	0.10%
Effective Income Tax Rate	39.00%	40.30%	39.20%

Income Taxes - Deferred Income

Income Taxes - Deferred Income Taxes Related to Temporary Differences between Tax Bases of Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax liabilities:
Accelerated depreciation	$ 286,618	$ 272,496
Prepaid costs currently deductible	6,997	6,358
Other	5,034	4,404
Total deferred tax liabilities	298,649	283,258
Deferred tax assets:
Accrued costs not yet deductible	8,638	7,463
Allowance for doubtful accounts	804	788
Net operating loss carry forwards and credits	577	302
Deferred revenues	1,945	1,132
Share-based compensation	3,334	4,671
Total deferred tax assets	15,298	14,356
Deferred income taxes, net	$ 283,351	$ 268,902

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Excess tax benefit (shortfall) from exercise of stock options	$ (292,000)	$ 1,822,000	$ 1,329,000
Undistributed earnings of foreign subsidiaries	$ 1,900,000	1,600,000
Likelihood percentage of being realized upon ultimate settlement with the relevant tax authority	50.00%
Unrecognized tax benefits	$ 0	0
Changes in unrecognized benefits	0	$ 0	$ 0
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Company's foreign net operating losses for tax purposes	$ 1,800,000
Foreign net operating loss carry forwards, expiration date	2,023

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2009	Jun. 06, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized				1,500,000	815,000
Share-based compensation expense	$ 3,399,000	$ 3,854,000	$ 3,680,000
Tax benefit related to share-based compensation expense	1,300,000	1,500,000	1,400,000
Capitalized share-based compensation expense	0	0	0
Amount of reduction in net income due to share-based compensation expense	$ 2,100,000	$ 2,300,000	$ 2,200,000
Amount of reduction in diluted earning per share to share-based compensation expense	$ 0.08	$ 0.09	$ 0.09
Stock option plans remain outstanding	1,410,650	1,343,760	1,772,062	2,838,553
Weighted average grant date fair value	$ 6.60	$ 9.17	$ 9.87
Plan merged assets	$ 16,400,000
Dividends deducted	300,000
Tax benefit from dividends	$ 100,000
Shares outstanding, employee stock ownership plan	339,640
Percentage of total common shares outstanding	2.00%
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized	843,024
Stock options granted	7,277,200
Stock options, exercise prices lower	$ 3.47
Stock options, exercise prices upper	$ 38.89
Purchase of shares	4,854,518
Stock option shares terminated	1,012,032
Stock option plans remain outstanding	1,410,650
Stock options outstanding, exercise prices lower	$ 15.62
Stock options outstanding, exercise prices upper	$ 38.89
Stock options vesting period	5 years
Options issued to non-employee advisors	0
Aggregate intrinsic value of options exercised and sold	$ 5,700,000	$ 8,400,000	$ 11,500,000
Total unrecognized compensation cost	$ 4,500,000
Expected recognition period of unrecognized compensation expense	2 years 8 months 12 days
Performance-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period	5 years
Percentage of vesting annually at anniversary	20.00%
Number of RSU's expected to vest	66,651
Performance-based RSUs [Member] | Vesting after three years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting RSUs	60.00%
Service-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU's expected to vest	18,000
Number of forfeitures expected	0
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected recognition period of unrecognized compensation expense	2 years 4 months 24 days
Number of forfeitures expected	80,320	7,540	4,300
Stock-based compensation expense for restricted stock	$ 1,700,000	$ 2,300,000	$ 2,000,000
Total unrecognized compensation expense net of forfeitures	$ 1,100,000
Minimum [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	7 years
Minimum [Member] | Service-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period	12 months
Maximum [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	10 years
Maximum [Member] | Service-based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period	14 months
2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in common stock available for grant	2
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock remained available for grants of awards						1,875,000
Minimum rate of exercise price granted	100.00%

Benefit Plans - Summary of Comp

Benefit Plans - Summary of Company's Option Activity (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options, Beginning Balance	1,343,760	1,772,062	2,838,553
Number of Options, granted	456,200	203,600	192,800
Number of Options, exercised	(270,650)	(612,682)	(1,237,341)
Number of Options, cancelled/forfeited/expired	(118,660)	(19,220)	(21,950)
Number of Options, Ending Balance	1,410,650	1,343,760	1,772,062
Number of Options, Exercisable at December 31, 2015	662,345
Number of Options, Expected to Vest after December 31, 2015	673,475
Weighted-Average Price, Beginning Balance	$ 27.25	$ 24.68	$ 24.37
Weighted-Average Price, Options granted	31.69	32.79	29.14
Weighted-Average Price, Options exercised	19.81	21.55	24.71
Weighted-Average Price, Options cancelled/forfeited/expired	29.58	30.35	25.20
Weighted-Average Price, Ending Balance	29.91	$ 27.25	$ 24.68
Weighted-Average Price, Exercisable at December 31, 2015	27.53
Weighted-Average Price, Expected to Vest after December 31, 2015	$ 31.64
Weighted-Average Remaining Contractual Term, Balance At December 31, 2015	3 years 9 months 26 days
Weighted-Average Remaining Contractual Term, Exercisable at December 31, 2015	1 year 10 months 21 days
Weighted-Average Remaining Contractual Term, Expected to Vest after December 31, 2015	5 years 6 months 11 days
Aggregate Intrinsic Value, Balance At December 31, 2015	$ (6.6)
Aggregate Intrinsic Value, Exercisable at December 31, 2015	(1.5)
Aggregate Intrinsic Value, Expected to Vest after December 31, 2015	$ (4.3)

Benefit Plans - Options Outstan

Benefit Plans - Options Outstanding and Options Exercisable by Exercise Price with Weighted-Average Remaining Contractual Life for Options Outstanding and Weighted-Average Exercise Price (Detail)	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Exercise Price 15-20 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Range Limit	$ 15
Exercise Price Upper Range Limit	$ 20
Options Outstanding, Number | shares	2,400
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	2 months 1 day
Options Outstanding, Weighted-Average Grant Date Value	$ 15.62
Options Exercisable, Number | shares	2,400
Options Exercisable, Weighted-Average Grant Date Value	$ 15.62
Exercise Price 20-25 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Range Limit	20
Exercise Price Upper Range Limit	$ 25
Options Outstanding, Number | shares	153,855
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	1 year 2 months 19 days
Options Outstanding, Weighted-Average Grant Date Value	$ 23.86
Options Exercisable, Number | shares	151,965
Options Exercisable, Weighted-Average Grant Date Value	$ 23.86
Exercise Price 25-30 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Range Limit	25
Exercise Price Upper Range Limit	$ 30
Options Outstanding, Number | shares	508,795
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	2 years 15 days
Options Outstanding, Weighted-Average Grant Date Value	$ 28.98
Options Exercisable, Number | shares	424,960
Options Exercisable, Weighted-Average Grant Date Value	$ 29.01
Exercise Price 30-35 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Range Limit	30
Exercise Price Upper Range Limit	$ 35
Options Outstanding, Number | shares	736,200
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	5 years 7 months 2 days
Options Outstanding, Weighted-Average Grant Date Value	$ 32.04
Options Exercisable, Number | shares	79,480
Options Exercisable, Weighted-Average Grant Date Value	$ 32.62
Exercise Price 35-40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Range Limit	35
Exercise Price Upper Range Limit	$ 40
Options Outstanding, Number | shares	9,400
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	4 years 11 months 16 days
Options Outstanding, Weighted-Average Grant Date Value	$ 37.83
Options Exercisable, Number | shares	3,540
Options Exercisable, Weighted-Average Grant Date Value	$ 37.90
Exercise Price 15-40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Lower Range Limit	15
Exercise Price Upper Range Limit	$ 40
Options Outstanding, Number | shares	1,410,650
Options Outstanding, Weighted-Average Remaining Contractual Life (Years)	3 years 9 months 26 days
Options Outstanding, Weighted-Average Grant Date Value	$ 29.91
Options Exercisable, Number | shares	662,345
Options Exercisable, Weighted-Average Grant Date Value	$ 27.53

Benefit Plans - Schedule of Wei

Benefit Plans - Schedule of Weighted-Average Assumptions Used to Determine Fair Value of Option Granted (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected term (in years)	5 years	5 years	5 years
Expected volatility	31.10%	40.50%	50.30%
Expected dividend yields	3.20%	3.00%	3.30%
Risk-free interest rates	1.60%	1.50%	0.80%

Benefit Plans - Summary of Co54

Benefit Plans - Summary of Company's Restricted Stock Units Activity (Detail) - Restricted Stock Units [Member] - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Beginning Balance	311,583	320,980	262,820
Number of Shares, granted	79,300	118,864	150,300
Number of Shares, vested	(89,915)	(120,721)	(87,840)
Number of Shares, cancelled/forfeited/expired	(80,320)	(7,540)	(4,300)
Number of Shares, Ending Balance	220,648	311,583	320,980
Weighted-Average Grant Date Fair Value, Beginning Balance	$ 29.78	$ 28.47	$ 28.22
Weighted-Average Grant Date Fair Value, granted	31.86	30.85	26.89
Weighted-Average Grant Date Fair Value, vested	27.97	27.30	24.98
Weighted-Average Grant Date Fair Value, cancelled/forfeited/expired	31.35	30.34	29.24
Weighted-Average Grant Date Fair Value, Ending Balance	$ 30.70	$ 29.78	$ 28.47
Aggregate Intrinsic Value	$ 5.6

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Aug. 31, 2015	May. 31, 2008
Stockholders Equity Note [Abstract]
Common stock shares authorized for repurchase			2,000,000	2,000,000
Shares remain authorized for repurchase	1,592,026
Common stock repurchased, Shares	2,407,974	0
Aggregate purchase price	$ 63,953
Average price per repurchased shares	$ 26.56

Commitments and Contingencies -

Commitments and Contingencies - Minimum Payments under Leases, Exclusive of Property Taxes and Insurance (Detail) $ in Thousands	Dec. 31, 2015USD ($)
Operating Leases Future Minimum Payments Due [Abstract]
2,016	$ 1,269
2,017	874
2,018	709
Thereafter	0
Total minimum future lease payments	$ 2,852

Commitments and Contingencies57

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Rent expense	$ 3.5	$ 3.4	$ 3.1

Intangible Assets - Summary of

Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Trade name	$ 5,700	$ 5,700
Customer relationships	9,611	9,611
Intangible Assets, gross	15,311	15,311
Less accumulated amortization	(5,846)	(4,975)
Intangible Assets, net	$ 9,465	$ 10,336
Estimated useful life (In years), Customer relationships	11 years

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 900,000	$ 800,000	$ 800,000
Subsequent impairment of the underlying assets	0
Expected annual amortization expense for 2016	900,000
Expected annual amortization expense for 2017	900,000
Expected annual amortization expense for 2018	900,000
Expected annual amortization expense for 2019	900,000
Expected annual amortization expense for 2020	$ 200,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - Sabre Manufacturing, LLC - USD ($)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Acquisition of liquid and solid containment tanks	$ 13,600,000
Amounts due to Sabre Manufacturing, LLC	$ 0
Amount due from (to) related party		$ 0	$ 0

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail) - Segment	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of reportable segments	4
Customer Concentration Risk [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Revenues from customers	10.00%	10.00%	10.00%
Geographic Concentration Risk [Member] | Sales [Member] | Foreign Country Customers [Member]
Segment Reporting Information [Line Items]
Revenues from customers	5.00%	5.00%	7.00%

Segment Reporting - Summarized

Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Rental revenues		$ 70,694	$ 70,195	$ 67,305	$ 65,502	$ 71,694	$ 69,642	$ 65,809	$ 62,430	$ 273,696	$ 269,575	$ 255,766
Rental related services revenues										73,314	64,132	53,148
Sales and other revenues										57,534	74,415	70,595
Total revenues		105,282	113,048	96,026	90,188	111,792	113,025	95,745	87,560	404,544	408,122	379,509
Depreciation of rental equipment										75,213	72,678	68,208
Gross profit		46,756	50,146	40,918	39,087	52,204	49,298	42,079	38,638	176,907	182,219	169,015
Selling and administrative expenses										99,950	96,859	88,765
Income (loss) from operation		21,467	25,150	16,465	13,875	26,796	25,098	18,239	15,227	76,957	85,360	80,250
Interest expense (income) allocation										(10,092)	9,280	8,687
Income before provision for income taxes		18,523	22,505	14,033	11,316	24,222	22,609	16,794	12,936	66,377	76,561	71,374
Rental equipment acquisitions										133,378	148,602	136,601
Accounts receivable, net (period end)		95,263				101,294				95,263	101,294	87,650
Rental equipment, at cost (period end)		1,310,083				1,229,638				1,310,083	1,229,638	1,144,168
Rental equipment, net book value (period end)		869,601	$ 864,277	$ 856,489	$ 839,078	825,750	$ 817,898	$ 795,532	$ 775,875	869,601	825,750	767,010
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Rental revenues										115,986	96,457	82,503
Rental related services revenues										45,616	35,263	28,891
Sales and other revenues										22,682	29,855	21,267
Total revenues										184,284	161,575	132,661
Depreciation of rental equipment										19,246	16,536	14,459
Gross profit										78,771	63,455	50,423
Selling and administrative expenses										46,496	42,069	36,488
Income (loss) from operation										32,275	21,386	13,935
Interest expense (income) allocation										(5,363)	4,768	4,318
Income before provision for income taxes										26,912	16,959	9,617
Rental equipment acquisitions										79,622	82,792	52,953
Accounts receivable, net (period end)		53,796				46,797				53,796	46,797	37,163
Rental equipment, at cost (period end)		736,875				664,340				736,875	664,340	592,391
Rental equipment, net book value (period end)		529,483				473,960				$ 529,483	$ 473,960	$ 415,366
Utilization (period end)	[1]									76.90%	75.00%	70.70%
Average utilization	[1]									75.80%	72.30%	68.30%
TRS-RenTelco [Member]
Segment Reporting Information [Line Items]
Rental revenues										$ 89,208	$ 99,020	$ 102,101
Rental related services revenues										3,055	3,331	3,095
Sales and other revenues										22,754	25,951	29,857
Total revenues										115,017	128,302	135,053
Depreciation of rental equipment										39,974	40,935	39,953
Gross profit										47,836	60,249	63,520
Selling and administrative expenses										22,930	23,736	24,542
Income (loss) from operation										24,906	36,513	38,978
Interest expense (income) allocation										(2,194)	2,075	2,156
Income before provision for income taxes										22,224	34,383	36,633
Rental equipment acquisitions										44,316	45,158	52,625
Accounts receivable, net (period end)		21,784				28,849				21,784	28,849	27,328
Rental equipment, at cost (period end)		262,945				261,995				262,945	261,995	267,772
Rental equipment, net book value (period end)		102,191				105,729				$ 102,191	$ 105,729	$ 109,988
Utilization (period end)	[1]									58.70%	59.80%	58.20%
Average utilization	[1]									60.50%	60.40%	62.70%
Adler Tanks [Member]
Segment Reporting Information [Line Items]
Rental revenues										$ 68,502	$ 74,098	$ 71,162
Rental related services revenues										24,643	25,538	21,162
Sales and other revenues										1,486	1,152	1,616
Total revenues										94,631	100,788	93,940
Depreciation of rental equipment										15,993	15,207	13,796
Gross profit										47,397	53,452	51,076
Selling and administrative expenses										27,494	27,424	24,644
Income (loss) from operation										19,903	26,028	26,432
Interest expense (income) allocation										(2,729)	2,618	2,419
Income before provision for income taxes										17,174	23,605	24,013
Rental equipment acquisitions										9,440	20,652	31,023
Accounts receivable, net (period end)		17,955				21,031				17,955	21,031	21,915
Rental equipment, at cost (period end)		310,263				303,303				310,263	303,303	284,005
Rental equipment, net book value (period end)		237,927				246,061				$ 237,927	$ 246,061	$ 241,656
Utilization (period end)	[1]									49.70%	63.90%	57.70%
Average utilization	[1]									58.30%	62.90%	64.20%
Enviroplex [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	[2]									$ 10,612	$ 17,457	$ 17,855
Total revenues	[2]									10,612	17,457	17,855
Gross profit	[2]									2,903	5,063	3,996
Selling and administrative expenses	[2]									3,030	3,630	3,091
Income (loss) from operation	[2]									(127)	1,433	905
Interest expense (income) allocation	[2]									194	(181)	(206)
Income before provision for income taxes	[2]									67	1,614	1,111
Accounts receivable, net (period end)	[2]	$ 1,728				$ 4,617				$ 1,728	$ 4,617	$ 1,244
[1]	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.
[2]	Gross Enviroplex sales revenues were $11,530, $19,017 and $17,859 in 2015, 2014 and 2013, respectively, which includes inter-segment sales to Mobile Modular of $918, $1,560 and $4, which have been eliminated in consolidation.

Segment Reporting - Summarize63

Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues		$ 105,282	$ 113,048	$ 96,026	$ 90,188	$ 111,792	$ 113,025	$ 95,745	$ 87,560	$ 404,544	$ 408,122	$ 379,509
Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues	[1]									10,612	17,457	17,855
Mobile Modular [Member]
Segment Reporting Information [Line Items]
Revenues										184,284	161,575	132,661
Operating Segments [Member] | Enviroplex [Member]
Segment Reporting Information [Line Items]
Revenues										11,530	19,017	17,859
Inter-segment Eliminations [Member] | Mobile Modular [Member]
Segment Reporting Information [Line Items]
Sales revenues										$ 918	$ 1,560	$ 4
[1]	Gross Enviroplex sales revenues were $11,530, $19,017 and $17,859 in 2015, 2014 and 2013, respectively, which includes inter-segment sales to Mobile Modular of $918, $1,560 and $4, which have been eliminated in consolidation.

Quarterly Financial Informati64

Quarterly Financial Information - Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operations Data
Rental revenues	$ 70,694	$ 70,195	$ 67,305	$ 65,502	$ 71,694	$ 69,642	$ 65,809	$ 62,430	$ 273,696	$ 269,575	$ 255,766
Total revenues	105,282	113,048	96,026	90,188	111,792	113,025	95,745	87,560	404,544	408,122	379,509
Gross profit	46,756	50,146	40,918	39,087	52,204	49,298	42,079	38,638	176,907	182,219	169,015
Income from operations	21,467	25,150	16,465	13,875	26,796	25,098	18,239	15,227	76,957	85,360	80,250
Income before provision for income taxes	18,523	22,505	14,033	11,316	24,222	22,609	16,794	12,936	66,377	76,561	71,374
Net income	$ 11,518	$ 13,616	$ 8,490	$ 6,846	$ 13,887	$ 13,746	$ 10,205	$ 7,871	$ 40,470	$ 45,709	$ 43,397
Earnings per share:
Basic	$ 0.48	$ 0.54	$ 0.33	$ 0.26	$ 0.54	$ 0.53	$ 0.39	$ 0.31	$ 1.60	$ 1.77	$ 1.71
Diluted	0.48	0.54	0.32	0.26	0.53	0.53	0.39	0.30	1.59	1.75	1.67
Dividends declared per share	$ 0.250	$ 0.250	$ 0.250	$ 0.250	$ 0.245	$ 0.245	$ 0.245	$ 0.245	$ 1	$ 0.98	$ 0.96
Shares used in per share calculations:
Basic	23,932	25,334	26,142	26,091	25,999	25,953	25,912	25,789	25,369	25,914	25,433
Diluted	24,015	25,408	26,273	26,276	26,206	26,152	26,220	26,230	25,457	26,175	25,926
Balance Sheet Data
Rental equipment, net	$ 869,601	$ 864,277	$ 856,489	$ 839,078	$ 825,750	$ 817,898	$ 795,532	$ 775,875	$ 869,601	$ 825,750	$ 767,010
Total assets	1,152,709	1,149,095	1,132,750	1,112,056	1,116,407	1,089,130	1,051,764	1,021,613	1,152,709	1,116,407
Notes payable	381,441	382,113	337,177	320,923	322,478	322,280	307,000	288,081	381,441	322,478
Shareholders' equity	$ 379,687	$ 389,464	$ 426,823	$ 425,848	$ 424,531	$ 414,519	$ 406,439	$ 401,563	$ 379,687	$ 424,531	$ 401,030	$ 364,738

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) - 2016 Amendment [Member] - Subsequent Event [Member]	Feb. 09, 2016USD ($)
Subsequent Event [Line Items]
Debt Instrument, Description	(i) the issuance period for the shelf notes to be issued and sold pursuant to the Note Purchase Agreement is extended until the earlier of February 9, 2019 or the termination of the issuance and sale of the shelf notes upon the 30 days’ prior notice of either PIM or the Company, and (ii) the definition of the “Available Facility Amount,” which is the aggregate amount of the shelf notes that may be authorized for purchase pursuant to the Note Purchase Agreement was amended to equal a formula based on: $250 million, minus the aggregate principal amount of the shelf notes then outstanding and purchased pursuant to the Note Purchase Agreement, minus the shelf notes accepted by the Company for purchase, but not yet purchased, by the Purchaser pursuant to the Note Purchase Agreement; provided, however, the aggregate amount of the shelf notes purchased by any corporation or other entity controlling, controlled by, or under common control with, PIM shall not exceed $200 million.
Stated formula value for determining available facility amount	$ 250,000,000
Maximum [Member]
Subsequent Event [Line Items]
Debt instrument, face amount	$ 200,000,000