Mobile Mini (MINI) 10-Q 30 Apr 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 24, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	MINI
Entity Registrant Name	MOBILE MINI INC
Entity Central Index Key	911109
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		45,832,303

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
ASSETS
Cash and cash equivalents	$3,048	$3,739
Receivables, net of allowance for doubtful accounts of $3,307 and $2,442 at March 31, 2015 and December 31, 2014, respectively	79,004	81,031
Inventories	16,518	16,736
Rental fleet, net	1,019,663	1,087,056
Property, plant and equipment, net	116,735	113,175
Deposits and prepaid expenses	7,501	8,586
Deferred financing costs, net and other assets	8,173	8,858
Intangibles, net	76,965	78,385
Goodwill	703,337	705,608
Total assets	2,030,944	2,103,174
Liabilities:
Accounts payable	30,465	22,933
Accrued liabilities	64,590	63,727
Lines of credit	701,381	705,518
Obligations under capital leases	26,270	24,918
Senior Notes	200,000	200,000
Deferred income taxes	213,365	231,547
Total liabilities	1,236,071	1,248,643
Commitments and contingencies
Stockholders' equity:
Preferred stock $.01 par value, 20,000 shares authorized, none issued
Common stock $.01 par value, 95,000 shares authorized, 49,087 issued and 45,835 outstanding at March 31, 2015 and 49,015 issued and 46,157 outstanding at December 31, 2014	491	490
Additional paid-in capital	572,364	569,083
Retained earnings	344,625	380,504
Accumulated other comprehensive loss	-41,647	-29,870
Treasury stock, at cost, 3,252 and 2,858 shares at March 31, 2015 and December 31, 2014, respectively	-80,960	-65,676
Total stockholders' equity	794,873	854,531
Total liabilities and stockholders' equity	$2,030,944	$2,103,174

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Per Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$3,307	$2,442
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	20,000	20,000
Preferred stock, issued	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	95,000	95,000
Common stock, issued	49,087	49,015
Common stock, outstanding	45,835	46,157
Treasury stock, shares	3,252	2,858

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Rental	$121,028	$94,080
Sales	6,724	7,866
Other	4,877	458
Total revenues	132,629	102,404
Costs and expenses:
Rental, selling and general expenses	83,982	68,356
Cost of sales	4,197	5,553
Restructuring expenses	483	585
Asset impairment charge, net	64,726	283
Depreciation and amortization	15,539	9,145
Total costs and expenses	168,927	83,922
(Loss) income from operations	-36,298	18,482
Other expense:
Interest expense	-9,059	-6,987
Foreign currency exchange		-1
(Loss) income before income tax (benefit) provision	-45,357	11,494
Income tax (benefit) provision	-18,031	4,054
Net (loss) income	($27,326)	$7,440
(Loss) earnings per share:
Basic	($0.60)	$0.16
Diluted	($0.60)	$0.16
Weighted average number of common and common share equivalents outstanding:
Basic	45,484	46,148
Diluted	45,484	46,837
Cash dividends declared per share	$0.19	$0.17

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	($27,326)	$7,440
Foreign currency translation adjustment	-11,777	1,180
Comprehensive (loss) income	($39,103)	$8,620

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net (loss) income	($27,326)	$7,440
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment charge, net	64,726	283
Provision for doubtful accounts	1,169	547
Amortization of deferred financing costs	789	703
Amortization of long-term liabilities	25	41
Share-based compensation expense	3,250	4,164
Depreciation and amortization	15,539	9,145
Gain on sale of rental fleet units	-1,972	-1,711
Loss on disposal of property, plant and equipment	335	72
Deferred income taxes	-18,233	3,954
Foreign currency loss		1
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables	-636	778
Inventories	157	228
Deposits and prepaid expenses	446	-1,276
Other assets and intangibles	9	-5
Accounts payable	1,033	3,061
Accrued liabilities	-839	-613
Net cash provided by operating activities	38,472	26,812
Cash Flows from Investing Activities:
Cash paid for businesses acquired, net of cash acquired	-1,200	-4,217
Additions to rental fleet, excluding acquisitions	-10,480	-4,078
Proceeds from sale of rental fleet units	4,842	5,627
Additions to property, plant and equipment, excluding acquisitions	-4,241	-2,628
Proceeds from sale of property, plant and equipment	607	908
Net cash used in investing activities	-10,472	-4,388
Cash Flows from Financing Activities:
Net repayments under lines of credit	-4,137	-16,307
Deferred financing costs	-100
Principal payments on capital lease obligations	-849	-367
Issuance of common stock	32	1,949
Dividend payments	-8,509	-7,849
Purchase of treasury stock	-15,284	-407
Net cash used in financing activities	-28,847	-22,981
Effect of exchange rate changes on cash	156	-132
Net decrease in cash	-691	-689
Cash and cash equivalents at beginning of period	3,739	1,256
Cash and cash equivalents at end of period	3,048	567
Supplemental Disclosure of Cash Flow Information:
Equipment acquired through capital lease obligations	2,201	1,983
Capital expenditures accrued or payable	$9,624	$1,246

Mobile_Mini_Organization_and_D

Mobile Mini, Organization and Description of Business	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Mobile Mini, Organization and Description of Business	(1) Mobile Mini, Organization and Description of Business
	Mobile Mini, Inc., a Delaware corporation, is a leading provider of portable storage and specialty containment solutions. In these notes, the terms “Mobile Mini” and the “Company” refer to Mobile Mini, Inc. In December 2014, the Company acquired Gulf Tanks Holdings, Inc. (“GTH”), the parent company of Houston, Texas-based Evergreen Tank Solutions (“ETS”). The transaction, referred to as the “ETS Acquisition,” closed on December 10, 2014.
	At March 31, 2015, Mobile Mini has a fleet of portable storage units operating throughout the U.S., Canada and the U.K. The Company has a diversified customer base for its portable storage products, including large and small retailers, construction companies, medical centers, schools, utilities, distributors, the military, hotels, restaurants, entertainment complexes and households. These customers use the products for a wide variety of applications, including the storage of retail and manufacturing inventory, construction materials and equipment, and documents and records. The ETS Acquisition resulted in a fleet of specialty containment products, including liquid and solid containment units, serving a specialty sector in the industry. Specialty products are rented primarily to chemical, refinery, oil and natural gas drilling, mining and environmental service customers. The operating results of ETS are included in the three month period ended March 31, 2015.
	Basis of Presentation and Consolidation
	The consolidated financial statements include the accounts of Mobile Mini and its wholly owned subsidiaries. The Company does not have any subsidiaries in which it does not own 100% of the outstanding stock. All significant intercompany balances and transactions have been eliminated. The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) applicable to interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements. In the opinion of management of Mobile Mini, Inc., all adjustments (which include normal recurring adjustments) necessary to present fairly the financial position, results of operations, and cash flows for all periods presented have been made. The results of operations for the three months ended March 31, 2015 and 2014 are not necessarily indicative of the results to be expected for the full year.
	These condensed consolidated financial statements should be read in conjunction with the Company’s December 31, 2014 audited consolidated financial statements and accompanying notes thereto, which are included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 27, 2015.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and the notes to those statements. Actual results could differ from those estimates. The most significant estimates included within the financial statements are the allowance for doubtful accounts, the estimated useful lives and residual values on the rental fleet, property, plant and equipment, goodwill and other asset impairments and certain accrued liabilities.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	(2) Recent Accounting Pronouncements
	Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. In April 2014, the Financial Accounting Standards Board (“FASB”) issued the accounting guidance on reporting discontinued operations and disclosures of disposals of components of an entity. The new guidance raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. The guidance is effective for fiscal years beginning after December 15, 2014. The Company will apply this guidance prospectively to transactions occurring after December 31, 2014.
	Revenue from Contracts with Customers. In May 2014, FASB issued the accounting standard on revenue from contracts with customers. The standard provides a single model for revenue arising from contracts with customers and supersedes current revenue recognition guidance. The standard requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of goods or services. The standard is effective for annual and interim periods beginning after December 15, 2016. Early adoption is not permitted. The revenue recognition standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the impact, if any, of the adoption of the standard to its financial statements and related disclosures. The Company has not yet selected a transition method nor determined the effect of the standard on its ongoing financial reporting.
	Simplifying the Presentation of Debt Issuance Costs. In April 2015, FASB issued accounting guidance on the presentation of debt issuance costs in the balance sheet. This standard requires 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 debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by this guidance. The Company will apply this guidance prospectively beginning in the fiscal year ended December 31, 2017. The application of this guidance will result in a reclassification of debt financing costs from other assets to a reduction of the specific debt liability, and will not affect the Company’s statement of operations or cash flow. As of March 31, 2015, the Company’s debt financing costs, net of accumulated amortization is $8.0 million.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	(3) Fair Value Measurements
	The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the Company adopted the suggested accounting guidance for the three levels of inputs that may be used to measure fair value:
	Level 1 —	Observable inputs such as quoted prices in active markets for identical assets or liabilities;
	Level 2 —	Observable inputs, other than Level 1 inputs in active markets, that are observable either directly or indirectly; and
	Level 3 —	Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions.
	At March 31, 2015 and December 31, 2014, the Company did not have any financial instruments required to be recorded at fair value on a recurring basis.
	The carrying amounts of cash, receivables, accounts payable and accrued liabilities approximate fair values based on their short-term nature. The fair values of the Company’s revolving credit facility and capital leases are estimated using discounted cash flow analyses, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. Based on the borrowing rates currently available to the Company for bank loans with similar terms and average maturities, the fair value of the Company’s revolving credit facility debt and capital leases at March 31, 2015 and December 31, 2014 approximated their respective book values and are considered Level 2 in the fair value hierarchy.
	The fair value of the Company’s $200.0 million aggregate principal amount of 7.875% senior notes due 2020 (the “2020 Notes” or the “Senior Notes”) is based on their latest sales price at the end of each period obtained from a third-party institution and is considered Level 2 in the fair value hierarchy, as there is not an active market for these notes.
	The carrying value and the fair value of the Company’s Senior Notes are as follows:
		March 31,		December 31,
		2015		2014
		(In thousands)
	Carrying value	$	200,000	$	200,000
	Fair value		211,000		206,000

Loss_Earnings_Per_Share

(Loss) Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
(Loss) Earnings Per Share	(4) (Loss) Earnings Per Share
	Basic (loss) earnings per share (“EPS”) is calculated by dividing net (loss) income by the weighted average number of common shares outstanding during the period. Diluted EPS is calculated under the treasury stock method. Potential common shares included nonvested share-awards, which is subject to risk of forfeiture, and incremental shares of common stock issuable upon the exercise of stock options.
	The following table is a reconciliation of net (loss) income and weighted-average shares of common stock outstanding for purposes of calculating basic and diluted EPS for the three months ended March 31:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands, except
			per share data)
	Numerator:
	Net (loss) income		$	(27,326	)	$	7,440
	Basic EPS Denominator:
	Common shares outstanding beginning of year			45,814			46,084
	Weighted shares issued (repurchased) during the period			(330	)		64
	Total weighted average shares outstanding			45,484			46,148
	Diluted EPS Denominator:
	Common shares outstanding beginning of year			45,814			46,084
	Net weighted shares issued (repurchased) during the period			(330	)		64
	Dilutive effect of stock options and nonvested share awards during the period (1)			—			689
	Total weighted average shares outstanding			45,484			46,837
	(Loss) earnings per share:
	Basic		$	(0.60	)	$	0.16
	Diluted			(0.60	)		0.16
	-1	Common stock equivalents of approximately 570,000 were excluded from the calculation of diluted earnings per share for the quarter ending March 31, 2015 because their inclusion would reduce the net loss per share.
	Basic weighted average number of common shares outstanding does not include nonvested share-awards of 0.4 million and 0.5 million shares as of March 31, 2015 and 2014, respectively.
	The following table represents the number of stock options and nonvested share-awards that were issued or outstanding but excluded in calculating diluted EPS because their effect would have been anti-dilutive for the quarters ended March 31:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands)
	Stock options			1,108			641
	Nonvested share-awards			—			—
	Total			1,108			641

Impairment_of_North_American_W

Impairment of North American Wood Mobile Offices	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment of North American Wood Mobile Offices	(5) Impairment of North American Wood Mobile Offices
	Mobile Mini’s business strategy is to invest in high return, low maintenance, long-lived assets. Wood mobile offices require more maintenance and upkeep than Mobile Mini’s stainless steel ground level offices and containers, resulting in lower margins as compared to other portable storage products, as well as the newly-acquired specialty containment products. During March 2015, the Company entered into discussions regarding the possible sale of Mobile Mini’s wood mobile offices within its North American Portable Storage segment. The discussions indicated that the fleet might be sold at an amount below carrying value. (See additional discussion regarding the divestiture of the wood mobile offices in Note 18.)
	Mobile Mini reviews long-lived assets such as rental fleet, property, plant and equipment, and intangibles, for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may be impaired. Based upon the events described above, the Company conducted a review for impairment for these particular long-lived assets as of March 31, 2015. The review included assumptions of cash flows considering the likelihood of possible outcomes that existed as of the date of the review, including assigning probabilities to the outcomes. Management estimated fair market value for the wood mobile offices based upon purchase price discussions. Based on this review, management determined that the assets were impaired as of March 31, 2015 and an impairment loss, was recognized in the amount by which the carrying amount of the asset group exceeded the estimated fair value as follows:
		March 31,
		2015
		(In thousands)
	Estimated fair market value	$	92,000
	Net book value:
	Wood mobile offices in rental fleet		155,558
	Ancillary items in property, plant and equipment		1,168
	Impairment loss	$	(64,726	)

Acquisition

Acquisition	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Acquisition	(6) Acquisition
	In the three months ended March 31, 2015, Mobile Mini completed one acquisition of a portable storage business. This acquisition expanded the Company’s existing operations in the Glasgow, Scotland market. The accompanying consolidated financial statements include the operations of the acquired business from the date of acquisition. The aggregate purchase price for the assets acquired were recorded based on their estimated fair values at the date of the acquisition. The Company has not disclosed the pro-forma impact of the acquisition on operations as it was immaterial to the Company’s financial position in the aggregate.
	The components of the purchase price and net assets acquired during the three months ended March 31, 2015 are as follows (in thousands):
	Net Assets Acquired:
	Rental fleet	$	991
	Intangible assets:
	Customer relationships		57
	Non-compete agreements		24
	Goodwill		128
	Total purchase price	$	1,200

Inventories

Inventories	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	(7) Inventories
	Inventories are valued at the lower of cost (principally on a standard cost basis which approximates the first-in, first-out (“FIFO”) method) or market. Market is the lower of replacement cost or net realizable value.
	Raw materials principally consist of raw steel, wood, glass, paint, vinyl and other assembly components used in manufacturing and remanufacturing processes, and to a lesser extent, parts used for internal maintenance, and ancillary items held for sale in our specialty containment segment. Work-in-process primarily represents partially assembled units pre-sold or for use as fleet. Finished portable storage units primarily represent purchased or assembled containers held in inventory until the container is either sold as is, remanufactured and sold, or remanufactured and deployed as rental fleet.
	Inventories at March 31, 2015 and December 31, 2014 consisted of the following:
		March 31,		December 31,
		2015		2014
		(In thousands)
	Raw materials and supplies	$	14,569	$	14,241
	Work-in-process		212		201
	Finished portable storage units		1,737		2,294
	Inventories	$	16,518	$	16,736

Rental_Fleet

Rental Fleet	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Rental Fleet	(8) Rental Fleet
	Rental fleet is capitalized at cost and depreciated over the estimated useful life of the unit using the straight-line method. Rental fleet is depreciated whether or not it is out on rent. Capitalized cost of rental fleet includes the price paid to acquire the unit and freight charges to the location when the unit is first placed in service, and when applicable, the cost of manufacturing or remanufacturing, which includes the cost of customizing units. Ordinary repair and maintenance costs are charged to operations as incurred.
	Management periodically reviews depreciable lives and residual values against various factors, including the results of its lenders’ independent appraisal of rental fleet, practices of competitors in comparable industries, profit margins achieved on sales of depreciated units and rental rates obtained on older units. See Note 5 for information regarding the impairment of wood mobile offices during the quarter ended March 31, 2015.
	Appraisals on our portable storage fleet are conducted on a regular basis by an independent appraiser selected by our lenders. Based on the values assigned in the most recent appraisal as of September 30, 2014, our portable storage rental fleet net liquidation value was approximately $1.0 billion as of March 31, 2015. In addition, an appraisal of our specialty product fleet was conducted as of December 2014 in conjunction with the ETS Acquisition. Based upon the values assigned in this appraisal, our specialty product rental fleet net liquidation value was approximately $90.7 million as of March 31, 2015. These appraisals were conducted by AccuVal Associates, Incorporated and are used to calculate our available borrowings under our Credit Agreement, as defined in Note 11.
	The Company’s depreciation expense related to its rental fleet for the three months ended March 31, 2015 and 2014 was $9.2 million and $5.3 million, respectively. At March 31, 2015 and December 31, 2014, all of the Company’s rental fleet units were pledged as collateral under the Credit Agreement.
	Rental fleet consisted of the following at March 31, 2015 and December 31, 2014:
			Residual Value			Useful Life	March 31,			December 31,
			as Percentage of			in Years	2015			2014
			Original Cost (1)
							(In thousands)
	Portable Storage:
	Steel storage containers			55	%	30	$	602,360		$	604,547
	Ground level offices			55	%	30		330,891			329,565
	Wood mobile offices			50	%	20		143,894			208,529
	Other							5,230			5,633
	Total							1,082,375			1,148,274
	Accumulated depreciation							(186,209	)		(182,437	)
	Total portable storage fleet, net						$	896,166		$	965,837
	Specialty Containment:
	Steel tanks					25	$	52,031		$	50,843
	Roll-off boxes					15 - 20		23,247			19,820
	Stainless steel tank trailers					25		8,189			7,667
	Vacuum boxes					20		23,287			23,283
	De-watering boxes					20		4,271			3,898
	Pumps and filtration equipment					7		11,655			11,510
	Other							5,954			5,468
	Total							128,634			122,489
	Accumulated depreciation							(5,137	)		(1,270	)
	Total specialty containment fleet, net						$	123,497		$	121,219
	Total rental fleet, net						$	1,019,663		$	1,087,056
	-1	Specialty containment fleet has been assigned zero residual value.

Property_Plant_and_Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	(9) Property, Plant and Equipment
	Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is provided using the straight-line method over the assets’ estimated useful lives. The Company’s depreciation expense related to property, plant and equipment for the three months ended March 31, 2015 and 2014 was $4.9 million and $3.5 million, respectively. Normal repairs and maintenance to property, plant and equipment are expensed as incurred. When property or equipment is retired or sold, the net book value of the asset, reduced by any proceeds, is charged to gain or loss on the disposal of property, plant and equipment and is included in rental, selling and general expenses in the Consolidated Statements of Operations. See Note 5 for information regarding the impairment of ancillary equipment related to wood mobile offices during the quarter ended March 31, 2015.
	Property, plant and equipment at March 31, 2015 and December 31, 2014 consisted of the following:
			Residual Value	Useful Life	March 31,			December 31,
			as Percentage of	in Years	2015			2014
			Original Cost
					(In thousands)
	Land				$	10,848		$	10,920
	Vehicles and machinery		0 - 55%	5 - 30		114,860			114,150
	Buildings and improvements (1)		0 - 25	3 - 30		19,489			19,365
	Office fixtures and equipment		0	3 - 5		35,198			33,942
	Property, plant and equipment					180,395			178,377
	Accumulated depreciation					(63,660	)		(65,202	)
	Property, plant and equipment, net				$	116,735		$	113,175
	-1	Improvements made to leased properties are amortized over the lesser of the estimated remaining life or the remaining term of the respective lease.

Goodwill_and_Intangibles

Goodwill and Intangibles	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	(10) Goodwill and Intangibles
	For acquired businesses, the Company records assets acquired and liabilities assumed at their 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 is recorded as goodwill. Estimated fair values of acquired assets is provisional and could change as additional information is received. During the current quarter, primarily due to further analysis of the assets acquired in the ETS acquisition, the associated goodwill was adjusted upward by $0.9 million.
	The following table shows the activity and balances related to goodwill from January 1, 2015 to March 31, 2015:
		(In thousands)
	Balance at January 1, 2015	$	705,608
	Acquisition		128
	Foreign currency		(3,318	)
	Adjustments		919
	Balance at March 31, 2015	$	703,337
	Intangible assets are amortized over the estimated useful life of the asset utilizing a method which reflects the estimated pattern in which the economic benefits will be consumed. Customer relationships and certain trade names and trademarks, are amortized using an accelerated method while other intangibles are amortized using the straight-line method.
	The following table reflects balances related to intangible assets for the periods presented:
				March 31, 2015							December 31, 2014
		Estimated		Gross		Accumulated			Net		Gross		Accumulated			Net
		Useful		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Life		Amount					Amount		Amount					Amount
				(In thousands)
	Customer relationships	11 - 20		$	91,642	$	(21,294	)	$	70,348	$	91,990	$	(20,484	)	$	71,506
	Trade names/trademarks	1 - 5			6,027		(1,078	)		4,949		6,065		(919	)		5,146
	Non-compete agreements	2 - 5			1,796		(167	)		1,629		1,772		(78	)		1,694
	Other	1 - 19			60		(21	)		39		61		(22	)		39
	Total			$	99,525	$	(22,560	)	$	76,965	$	99,888	$	(21,503	)	$	78,385
	Amortization expense for amortizable intangibles was approximately $1.5 million and $0.3 million for the three-month periods ended March 31, 2015 and 2014, respectively. Based on the carrying value at March 31, 2015, future amortization of intangible assets is expected to be as follows for the years ended December 31 (in thousands):
	2015 (remaining)	$	4,387
	2016		5,931
	2017		5,921
	2018		5,973
	2019		6,011
	Thereafter		48,742
	Total	$	76,965

Lines_of_Credit

Lines of Credit	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Lines of Credit	(11) Lines of Credit
	The Company has a $1.0 billion ABL Credit Agreement with Deutsche Bank AG New York Branch and other lenders party thereto (the “Credit Agreement”). The Credit Agreement provides for a five-year, revolving credit facility and all amounts outstanding under the Credit Agreement are due on February 22, 2017. The obligations of Mobile Mini and its subsidiary guarantors under the Credit Agreement are secured by a blanket lien on substantially all of its assets.
	Amounts borrowed under the Credit Agreement and repaid or prepaid during the term may be reborrowed. Outstanding amounts under the Credit Agreement bear interest at the Company’s option at either: (i) LIBOR plus a defined margin, or (ii) the Agent bank’s prime rate plus a margin. The applicable margin for each type of loan is based on an availability-based pricing grid and ranges from 1.75% to 2.25% for LIBOR loans and 0.75% to 1.25% for base rate loans at each measurement date. As of March 31, 2015, the applicable margins are 2.00% for LIBOR loans and 1.00% for base rate loans.
	Availability of borrowings under the Credit Agreement is subject to a borrowing base calculation based upon a valuation of the Company’s eligible accounts receivable, eligible container fleet (including containers held for sale, work-in-process and raw materials) and machinery and equipment, each multiplied by an applicable advance rate or limit. The rental fleet is appraised at least once annually by a third-party appraisal firm and up to 90% of the net orderly liquidation value, as defined in the Credit Agreement, is included in the borrowing base to determine how much the Company may borrow under the Credit Agreement.
	The Credit Agreement provides for U.K. borrowings, which are, at the Company’s option, denominated in either Pounds Sterling or Euros, by its U.K. subsidiary based upon a U.K. borrowing base; Canadian borrowings, which are denominated in Canadian dollars, by its Canadian subsidiary based upon a Canadian borrowing base; and U.S. borrowings, which are denominated in U.S. dollars, by the Company based upon a U.S. borrowing base along with any Canadian assets not included in the Canadian subsidiary.
	The Credit Agreement also contains customary negative covenants, including covenants that restrict the Company’s ability to, among other things: (i) allow certain liens to attach to the Company or its subsidiary assets; (ii) repurchase or pay dividends or make certain other restricted payments on capital stock and certain other securities, prepay certain indebtedness or make acquisitions or other investments subject to Payment Conditions (as defined in the Credit Agreement); and (iii) incur additional indebtedness or engage in certain other types of financing transactions. Payment Conditions allow restricted payments and acquisitions to occur without financial covenants as long as the Company has $250.0 million of pro forma excess borrowing availability under the Credit Agreement. The Company must also comply with specified financial maintenance covenants and affirmative covenants only if the Company falls below $100.0 million of borrowing availability levels with set permitted values for the Debt Ratio and Fixed Charge Coverage Ratio (as defined in the Credit Agreement). The Company was in compliance with the terms of the Credit Agreement as of March 31, 2015, and was above the minimum borrowing availability threshold and therefore not subject to any financial maintenance covenants.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	(12) Income Taxes
	The Company files U.S. Federal tax returns, U.S. state tax returns and foreign tax returns. The Company has identified its U.S. Federal tax return as its “major” tax jurisdiction. For the U.S. Federal return, its tax years for 2011, 2012 and 2013 are subject to tax examination by the U.S. Internal Revenue Service through September 15, 2015, 2016 and 2017, respectively. The Company does not anticipate that the total amount of unrecognized tax benefit related to any particular tax position will change significantly within the next 12 months.
	The Company uses a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement.
	The Company’s policy for recording interest and penalties associated with audits is to record such items as a component of income before taxes. Penalties and associated interest costs, if any, are recorded in rental, selling and general expenses in its Condensed Consolidated Statements of Operations.

Sharebased_Compensation

Share-based Compensation	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation	(13) Share-based Compensation
	The Company has historically awarded stock options and nonvested share-awards for employees and non-employee directors as a means of attracting and retaining quality personnel and to align employee performance with stockholder value. Stock option plans are approved by the Company’s stockholders and administered by the compensation committee of the board of directors (“Board”). The current plan allows for a variety of equity programs designed to provide flexibility in implementing equity and cash awards, including incentive stock options, nonqualified stock options, nonvested share-awards, restricted stock units, stock appreciation rights, performance stock, performance units and other share-based awards. Participants may be granted any one of the equity awards or any combination. The Company does not award stock options with an exercise price below the market price of the underlying securities on the date of award. As of March 31, 2015, 2.5 million shares remain available for future grants. Generally stock options have contractual terms of ten years.
	For both the quarters ended March 31, 2015 and 2014, all share-based compensation is included in rental, selling and general expenses. As of March 31, 2015, total unrecognized compensation cost related to stock option awards was approximately $10.1 million and the related weighted-average period over which it is expected to be recognized is approximately 1.7 years. As of March 31, 2015, the unrecognized compensation cost related to nonvested share-awards was approximately $9.9 million, which is expected to be recognized over a weighted-average period of approximately 2.6 years.
	Stock options. The fair value of each stock option award is estimated on the date of the grant using the Black-Scholes option pricing model which requires the input of assumptions. Management estimates the risk-free interest rate based on the U.S. Treasury security rate in effect at the time of the grant. The expected life of the options, volatility and dividend rates are estimated based on the Company’s historical data. The following are the key assumptions used for options granted during the three month periods ended March 31:
		2015		2014
	Risk-free interest rate	1.3% - 1.5%			1.5	%
	Expected life of the options (years)	5			5
	Expected stock price volatility	35.6% - 35.7%			38.4	%
	Expected dividend rate	1.8% - 2.0%			1.6	%
	The following table summarizes stock option activity for the three months ended March 31, 2015 (share amounts in thousands):
		Number of				Weighted
		Shares				Average
						Exercise Price
	Options outstanding, beginning of period		2,649			$	32.33
	Granted		363				42.8
	Canceled/Expired		(16	)			45.72
	Exercised		(1	)			25.43
	Options outstanding, end of period		2,995				33.53
	A summary of stock options outstanding as of March 31, 2015, is as follows:
		Number of				Weighted		Weighted		Aggregate
		Shares				Average		Average		Intrinsic
						Exercise		Remaining		Value
						Price		Contractual
								Terms
		(In thousands)						(In years)		(In thousands)
	Outstanding		2,995			$	33.53		8.11	$	28,595
	Vested and expected to vest		2,887				33.28		8.07		28,242
	Exercisable		1,659				30.8		7.68		19,997
	The aggregate intrinsic value of options exercised during the three months ended March 31, 2015, was approximately $23,000 and the weighted average fair value of stock options granted was $8.42.
	Nonvested share-awards. The fair value of nonvested share-awards is estimated as the closing price of Mobile Mini’s common stock on the date of grant. A summary of nonvested share-awards activity is as follows (share amounts in thousands):
		Shares				Weighted Average
						Grant Date Fair
						Value
	Nonvested at beginning of period		343			$	27.99
	Awarded		81				37.22
	Released		(29	)			34.78
	Forfeited		(11	)			24.14
	Nonvested at end of period		384				29.57
	The total fair value of nonvested share-awards that vested during the three months ended March 31, 2015 was $1.0 million.

Restructuring_Costs

Restructuring Costs	3 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring Costs	(14) Restructuring Costs
	The Company’s restructuring costs in the three month periods ended March 31, 2015 and 2014, include the following actions to align its business operations, some of which were begun in previous periods: the termination of the consumer initiative program in the third quarter of 2012, the sale of the Company’s Belfast, North Ireland location in the second quarter of 2014, the realignment of the Company’s corporate organization, field management and sales force structures in North America throughout 2014, and additional field restructuring in 2015 to facilitate the integration of ETS. The accrued restructuring obligations as of March 31, 2015 were related to the Company’s operations in North America.
	The following table details accrued restructuring obligations (included in accrued liabilities in the Consolidated Balance Sheets) and related activity for the year ended December 31, 2014 and the three-month period ended March 31, 2015.
			Severance			Lease			Other			Total
			and			Abandonment			Costs
			Benefits			Costs
			(In thousands)
	Accrued obligations as of January 1, 2014		$	613		$	1,063		$	—		$	1,676
	Restructuring expense			1,826			318			1,398			3,542
	Settlement of obligations			(1,998	)		(705	)		(1,398	)		(4,101	)
	Accrued obligations as of December 31, 2014			441			676			—			1,117
	Restructuring expense			464			19			—			483
	Settlement of obligations			(157	)		(61	)		—			(218	)
	Accrued obligations as of March 31, 2015		$	748		$	634		$	—		$	1,382
	The majority of accrued obligations are expected to be paid out through the year 2015, with the exception of a lease that will continue into the first quarter of 2019.
	The following amounts are included in restructuring expense for the periods indicated:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands)
	Severance and benefits		$	464		$	340
	Lease abandonment costs			19			139
	Other costs (1)			—			106
	Restructuring expenses		$	483		$	585
	-1	Other costs for 2014 include the sale of the Company’s Belfast, Northern Ireland location.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	(15) Commitments and Contingencies
	Mobile Mini is a party to various claims and litigation in the normal course of business. Management’s current estimated range of liability related to various claims and pending litigation is based on claims for which management can determine that it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Because of the uncertainties related to both the probability of incurred and possible range of loss on pending claims and litigation, management must use considerable judgment in making a reasonable determination of the liability that could result from an unfavorable outcome. As additional information becomes available estimates will be revised as appropriate. Management does not anticipate the resolution of such matters known at this time will have a material adverse effect on our business or consolidated financial position.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Stockholders' Equity	(16) Stockholders’ Equity
	Dividends
	On January 21, 2015, the board of directors authorized and declared a cash dividend to all the Company’s common stockholders of $0.187 per share of common stock, paid on March 19, 2015 to stockholders of record as of the close of business on March 5, 2015. Each future quarterly dividend payment is subject to review and approval by the Board. In addition, the Company’s Credit Agreement contains restrictions on the declaration and payment of dividends.
	Treasury stock
	On November 6, 2013, the Board approved a share repurchase program authorizing up to $125.0 million of the Company’s outstanding shares of common stock to be repurchased. The shares may be repurchased from time to time in the open market or in privately negotiated transactions. The share repurchases are subject to prevailing market conditions and other considerations. The share repurchase program does not have an expiration date and may be suspended or terminated at any time by the Board. All shares repurchased are held in treasury.
	During the three months ended March 31, 2015, the Company purchased approximately 387,000 shares of its common stock at a cost of $15.0 million under the authorized share repurchase program, and approximately $85.0 million is available for repurchase as of March 31, 2015. In addition, the Company withheld approximately 7,000 shares of stock from employees, for an approximate value of $276,000, upon vesting of share awards to satisfy minimum tax withholding obligations. These shares were not acquired pursuant to the share repurchase program.

Segment_Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Reporting	(17) Segment Reporting
	Prior to the ETS Acquisition, the Company’s operations were comprised of two reportable segments: North America and the U.K., both of which offer portable storage solutions. Discrete financial data on each of the Company’s products is not available and it would be impractical to collect and maintain financial data in such a manner. As a result of the ETS Acquisition, the Company established a new specialty containment reporting segment. Operations related to ETS are included in Mobile Mini’s consolidated results for the three months ended March 31, 2015.
	The results for each segment are reviewed discretely by senior management. Within their segment, locations generally have similar economic characteristics covering all products rented or sold, including customer base, sales personnel, advertising, yard facilities, general and administrative costs and field operations management.
	All of the Company’s locations operate in their local currency and, although the Company is exposed to foreign exchange rate fluctuation in foreign markets where the Company rents and sells its products, the Company does not believe such exposure will have a significant impact on its results of operations.
	The following tables set forth certain information regarding each of the Company’s segments for the three month periods ended March 31, 2015 and 2014.
		For the Three Months Ended March 31, 2015
		Portable Storage
		North			United		Total			Specialty		Consolidated
		America			Kingdom					Containment
		(In thousands)
	Revenues:
	Rental	$	78,984		$	20,020	$	99,004		$	22,024	$	121,028
	Sales		4,983			979		5,962			762		6,724
	Other		1,439			90		1,529			3,348		4,877
	Total revenues		85,406			21,089		106,495			26,134		132,629
	Costs and expenses:
	Rental, selling and general expenses		53,580			13,652		67,232			16,750		83,982
	Cost of sales		3,122			742		3,864			333		4,197
	Restructuring expenses		217			—		217			266		483
	Asset impairment charge, net		64,726			—		64,726			—		64,726
	Depreciation and amortization		7,890			1,576		9,466			6,073		15,539
	Total costs and expenses		129,535			15,970		145,505			23,422		168,927
	(Loss) income from operations	$	(44,129	)	$	5,119	$	(39,010	)	$	2,712	$	(36,298	)
	Interest expense, net of interest income	$	6,149		$	218	$	6,367		$	2,692	$	9,059
	Income tax (benefit) provision		(18,998	)		959		(18,039	)		8		(18,031	)
		For the Three Months Ended March 31, 2014
		Portable Storage
		North			United		Total			Specialty		Consolidated
		America			Kingdom					Containment
		(In thousands)
	Revenues:
	Rental	$	75,483		$	18,597	$	94,080		$	—	$	94,080
	Sales		6,578			1,288		7,866			—		7,866
	Other		354			104		458			—		458
	Total revenues		82,415			19,989		102,404			—		102,404
	Costs and expenses:
	Rental, selling and general expenses		54,707			13,649		68,356			—		68,356
	Cost of sales		4,590			963		5,553			—		5,553
	Restructuring expenses		397			188		585			—		585
	Asset impairment charge, net		159			124		283			—		283
	Depreciation and amortization		7,418			1,727		9,145			—		9,145
	Total costs and expenses		67,271			16,651		83,922			—		83,922
	Income from operations	$	15,144		$	3,338	$	18,482		$	—	$	18,482
	Interest expense, net of interest income	$	6,717		$	270	$	6,987		$	—	$	6,987
	Income tax provision		3,299			755		4,054			—		4,054
	The previous schedules include revenues in the U.S. of $110.5 million and $81.1 million for the three month periods ended March 31, 2015 and 2014, respectively.
	Assets related to the Company’s segments include the following:
		Portable Storage
		North			United		Total			Specialty		Consolidated
		America			Kingdom					Containment
		(In thousands)
	As of March 31, 2015:
	Goodwill	$	458,852		$	61,634	$	520,486		$	182,851	$	703,337
	Intangibles		1,912			618		2,530			74,435		76,965
	Rental Fleet		755,434			140,732		896,166			123,497		1,019,663
	Property Plant and Equipment		87,153			15,511		102,664			14,071		116,735
	As of December 31, 2014:
	Goodwill	$	459,234		$	64,402	$	523,636		$	181,972	$	705,608
	Intangibles		2,119			651		2,770			75,615		78,385
	Rental Fleet		825,158			140,679		965,837			121,219		1,087,056
	Property Plant and Equipment		82,514			16,488		99,002			14,173		113,175
	The previous schedules include assets in the U.S. of $1.7 billion as of March 31, 2015 and December 31, 2014.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	(18) Subsequent Events
	Divestiture of North American wood mobile office fleet
	On April 16, 2015 the Company entered into a definitive agreement to sell its wood mobile offices within its North American Portable Storage segment for a cash price of $92.0 million. See Note 5 for information regarding the $64.7 million impairment related to these assets recorded during the quarter ended March 31, 2015. The transaction is expected to be completed in May 2015, at which time the Company expects to recognize approximately $2 million of divestiture-related expenses. Cash received will be net of approximately $6.6 million of deferred revenue related to these products.
	Increase to treasury stock repurchase program.
	On April 17, 2015, Mobile Mini’s Board approved a $50 million increase in the current share repurchase program to $175 million. Through April 30, 2015, the Company has repurchased $40.0 million of shares under this program and approximately $135.0 million is available for repurchase as of April 30, 2015.
	Declaration of quarterly dividend
	On April 29, 2015, the Company’s Board authorized and declared a quarterly dividend to all the Company’s common stockholders of $0.187 per share of common stock, payable on June 3, 2015 to all stockholders of record as of the close of business on May 20, 2015.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Information	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Financial Information	(19) Condensed Consolidating Financial Information
	The following tables reflect the condensed consolidating financial information of the Company’s subsidiary guarantors of the Senior Notes and its non-guarantor subsidiaries. Separate financial statements of the subsidiary guarantors are not presented because the guarantee by each 100% owned subsidiary guarantor is full and unconditional, joint and several, subject to customary exceptions, and management has determined that such information is not material to investors.
	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING BALANCE SHEETS
	As of March 31, 2015
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	ASSETS
	Cash and cash equivalents	$	1,980		$	1,068		$	—		$	3,048
	Receivables, net		60,310			18,694			—			79,004
	Inventories		15,447			1,071			—			16,518
	Rental fleet, net		868,049			151,614			—			1,019,663
	Property, plant and equipment, net		100,180			16,555			—			116,735
	Deposits and prepaid expenses		6,442			1,059			—			7,501
	Deferred financing costs, net and other assets		8,173			—			—			8,173
	Intangibles, net		76,259			706			—			76,965
	Goodwill		636,863			66,474			—			703,337
	Intercompany receivables		144,313			33,670			(177,983	)		—
	Total assets	$	1,918,016		$	290,911		$	(177,983	)	$	2,030,944
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Liabilities:
	Accounts payable	$	20,531		$	9,934		$	—		$	30,465
	Accrued liabilities		57,658			6,932			—			64,590
	Lines of credit		697,533			3,848			—			701,381
	Obligations under capital leases		26,133			137			—			26,270
	Senior Notes		200,000			—			—			200,000
	Deferred income taxes		195,840			17,525			—			213,365
	Intercompany payables		—			92			(92	)		—
	Total liabilities		1,197,695			38,468			(92	)		1,236,071
	Commitments and contingencies
	Stockholders’ equity:
	Common stock		491			18,388			(18,388	)		491
	Additional paid-in capital		572,364			160,347			(160,347	)		572,364
	Retained earnings		228,426			115,355			844			344,625
	Accumulated other comprehensive loss		—			(41,647	)		—			(41,647	)
	Treasury stock, at cost		(80,960	)		—			—			(80,960	)
	Total stockholders’ equity		720,321			252,443			(177,891	)		794,873
	Total liabilities and stockholders’ equity	$	1,918,016		$	290,911		$	(177,983	)	$	2,030,944
	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING BALANCE SHEETS
	As of December 31, 2014
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	ASSETS
	Cash and cash equivalents	$	2,977		$	762		$	—		$	3,739
	Receivables, net		62,033			18,998			—			81,031
	Inventories		15,371			1,365			—			16,736
	Rental fleet, net		934,433			152,623			—			1,087,056
	Property, plant and equipment, net		95,509			17,666			—			113,175
	Deposits and prepaid expenses		7,375			1,211			—			8,586
	Deferred financing costs, net and other assets		8,858			—			—			8,858
	Intangibles, net		77,629			756			—			78,385
	Goodwill		635,943			69,665			—			705,608
	Intercompany receivables		145,018			33,971			(178,989	)		—
	Total assets	$	1,985,146		$	297,017		$	(178,989	)	$	2,103,174
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Liabilities:
	Accounts payable	$	14,803		$	8,130		$	—		$	22,933
	Accrued liabilities		56,104			7,623			—			63,727
	Lines of credit		702,135			3,383			—			705,518
	Obligations under capital leases		24,760			158			—			24,918
	Senior Notes		200,000			—			—			200,000
Deferred income taxes		215,184			17,367			(1,004	)		231,547
Intercompany payables		—			94			(94	)		—
Total liabilities		1,212,986			36,755			(1,098	)		1,248,643
Commitments and contingencies
Stockholders’ equity:
Common stock		490			18,388			(18,388	)		490
Additional paid-in capital		569,083			160,347			(160,347	)		569,083
Retained earnings		268,263			111,397			844			380,504
Accumulated other comprehensive loss		—			(29,870	)		—			(29,870	)
Treasury stock, at cost		(65,676	)		—			—			(65,676	)
Total stockholders’ equity		772,160			260,262			(177,891	)		854,531
Total liabilities and stockholders’ equity	$	1,985,146		$	297,017		$	(178,989	)	$	2,103,174
MOBILE MINI, INC.
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS
Three Months Ended March 31, 2015
(In thousands)
	Guarantors			Non-			Eliminations			Consolidated
				Guarantors
Revenues:
Rental	$	100,018		$	21,010		$	—		$	121,028
Sales		5,669			1,055			—			6,724
Other		4,787			90			—			4,877
Total revenues		110,474			22,155			—			132,629
Costs and expenses:
Rental, selling and general expenses		69,610			14,372			—			83,982
Cost of sales		3,401			796			—			4,197
Restructuring expenses		483			—			—			483
Asset impairment charge		64,726			—			—			64,726
Depreciation and amortization		13,848			1,691			—			15,539
Total costs and expenses		152,068			16,859			—			168,927
(Loss) income from operations		(41,594	)		5,296			—			(36,298	)
Other income (expense):
Interest income		2,662			—			(2,662	)		—
Interest expense		(11,343	)		(378	)		2,662			(9,059	)
(Loss) income before income tax provision		(50,275	)		4,918			—			(45,357	)
Income tax (benefit) provision		(18,991	)		960			—			(18,031	)
Net (loss) income	$	(31,284	)	$	3,958		$	—		$	(27,326	)
MOBILE MINI, INC.
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Three Months Ended March 31, 2015
(In thousands)
	Guarantors			Non-			Eliminations			Consolidated
				Guarantors
Net (loss) income	$	(31,284	)	$	3,958		$	—		$	(27,326	)
Foreign currency translation adjustment		—			(11,777	)		—			(11,777	)
Comprehensive loss	$	(31,284	)	$	(7,819	)	$	—		$	(39,103	)
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS
Three Months Ended March 31, 2014
(In thousands)
	Guarantors			Non-			Eliminations			Consolidated
				Guarantors
Revenues:
Rental	$	74,268		$	19,812		$	—		$	94,080
Sales		6,527			1,339			—			7,866
Other		351			107			—			458
Total revenues		81,146			21,258			—			102,404
Costs and expenses:
Cost of sales		4,552			1,001			—			5,553
Rental, selling and general expenses		53,708			14,648			—			68,356
Restructuring expenses		397			188			—			585
Asset impairment charge, net		136			147			—			283
Depreciation and amortization		7,277			1,868			—			9,145
Total costs and expenses		66,070			17,852			—			83,922
Income from operations		15,076			3,406			—			18,482
Other income (expense):
Interest income		30			—			(30	)		—
Interest expense		(6,599	)		(418	)		30			(6,987	)
Foreign currency exchange		—			(1	)		—			(1	)
Income before income tax provision		8,507			2,987			—			11,494
Income tax provision		3,299			755			—			4,054
Net income	$	5,208		$	2,232		$	—		$	7,440
MOBILE MINI, INC.
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
Three Months Ended March 31, 2014
(In thousands)
	Guarantors			Non-			Eliminations			Consolidated
				Guarantors
Net income	$	5,208		$	2,232		$	—		$	7,440
Foreign currency translation adjustment		—			1,180			—			1,180
Comprehensive income	$	5,208		$	3,412		$	—		$	8,620
MOBILE MINI, INC.
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
Three Months Ended March 31, 2015
(In thousands)
	Guarantors			Non-			Eliminations			Consolidated
				Guarantors
Cash Flows from Operating Activities:
Net income	$	(31,284	)	$	3,958		$	—		$	(27,326	)
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment charge		64,726			—			—			64,726
Provision for doubtful accounts		947			222			—			1,169
Amortization of deferred financing costs		775			14			—			789
Amortization of long-term liabilities		25			—			—			25
Share-based compensation expense		3,160			90			—			3,250
Depreciation and amortization		13,848			1,691			—			15,539
Gain on sale of rental fleet units		(1,826	)		(146	)		—			(1,972	)
Loss on disposal of property, plant and equipment		219			116			—			335
Deferred income taxes		(19,192	)		959			—			(18,233	)
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables		188			(824	)		—			(636	)
Inventories		(75	)		232			—			157
Deposits and prepaid expenses		348			98			—			446
Other assets and intangibles		9			—			—			9
Accounts payable		751			282			—			1,033
Accrued liabilities		(467	)		(372	)		—			(839	)
Intercompany		683			(844	)		161			—
Net cash provided by operating activities		32,835			5,476			161			38,472
Cash Flows from Investing Activities:
Cash paid for businesses, net of cash acquired		—			(1,200	)		—			(1,200	)
Additions to rental fleet		(5,745	)		(4,735	)		—			(10,480	)
Proceeds from sale of rental fleet units		4,268			574			—			4,842
Additions to property, plant and equipment		(3,307	)		(934	)		—			(4,241	)
Proceeds from sale of property, plant and equipment		243			364			—			607
Net cash used in investing activities		(4,541	)		(5,931	)		—			(10,472	)
Cash Flows from Financing Activities:
Net borrowings (repayments) under lines of credit		(4,602	)		619			(154	)		(4,137	)
Deferred financing costs		(100	)		—			—			(100	)
Principal payments on capital lease obligations		(828	)		(14	)		(7	)		(849	)
Issuance of common stock		32			—			—			32
Dividend payments		(8,509	)		—			—			(8,509	)
Purchase of treasury stock		(15,284	)		—			—			(15,284	)
Net cash (used in) provided by financing activities		(29,291	)		605			(161	)		(28,847	)
Effect of exchange rate changes on cash		—			156			—			156
Net (decrease) increase in cash		(997	)		306			—			(691	)
Cash and cash equivalents at beginning of period		2,977			762			—			3,739
Cash and cash equivalents at end of period	$	1,980		$	1,068		$	—		$	3,048
MOBILE MINI, INC.
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
Three Months Ended March 31, 2014
(In thousands)
	Guarantors			Non-			Eliminations			Consolidated
				Guarantors
Cash Flows from Operating Activities:
Net income	$	5,208		$	2,232		$	—		$	7,440
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment charge, net		136			147			—			283
Provision for doubtful accounts		453			94			—			547
Amortization of deferred financing costs		687			16			—			703
Amortization of long-term liabilities		40			1			—			41
Share-based compensation expense		3,963			201			—			4,164
Depreciation and amortization		7,277			1,868			—			9,145
Gain on sale of rental fleet units		(1,500	)		(211	)		—			(1,711	)
Loss on disposal of property, plant and equipment		48			24			—			72
Deferred income taxes		3,201			753			—			3,954
Foreign currency loss		—			1			—			1
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables		1,404			(626	)		—			778
Inventories		285			(57	)		—			228
Deposits and prepaid expenses		(1,416	)		140			—			(1,276	)
Other assets and intangibles		(178	)		173			—			(5	)
Accounts payable		1,123			1,938			—			3,061
Accrued liabilities		(350	)		(263	)		—			(613	)
Intercompany		756			(756	)		—			—
Net cash provided by operating activities		21,137			5,675			—			26,812
Cash Flows from Investing Activities:
Cash paid for businesses, net of cash acquired		(4,217	)		—			—			(4,217	)
Additions to rental fleet		(1,834	)		(2,244	)		—			(4,078	)
Proceeds from sale of rental fleet units		4,781			846			—			5,627
Additions to property, plant and equipment		(2,393	)		(235	)		—			(2,628	)
Proceeds from sale of property, plant and equipment		708			200			—			908
Net cash used in investing activities		(2,955	)		(1,433	)		—			(4,388	)
Cash Flows from Financing Activities:
Net repayments under lines of credit		(10,773	)		(5,534	)		—			(16,307	)
Principal payments on capital lease obligations		(367	)		—			—			(367	)
Issuance of common stock		1,949			—			—			1,949
Dividend payments		(7,849	)		—			—			(7,849	)
Purchase of treasury stock		(407	)		—			—			(407	)
Net cash used in financing activities		(17,447	)		(5,534	)		—			(22,981	)
Effect of exchange rate changes on cash		—			(132	)		—			(132	)
Net increase (decrease) in cash		735			(1,424	)		—			(689	)
Cash and cash equivalents at beginning of period		(190	)		1,446			—			1,256
Cash and cash equivalents at end of period	$	545		$	22		$	—		$	567

Mobile_Mini_Organization_and_D1

Mobile Mini, Organization and Description of Business (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation
	The consolidated financial statements include the accounts of Mobile Mini and its wholly owned subsidiaries. The Company does not have any subsidiaries in which it does not own 100% of the outstanding stock. All significant intercompany balances and transactions have been eliminated. The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) applicable to interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements. In the opinion of management of Mobile Mini, Inc., all adjustments (which include normal recurring adjustments) necessary to present fairly the financial position, results of operations, and cash flows for all periods presented have been made. The results of operations for the three months ended March 31, 2015 and 2014 are not necessarily indicative of the results to be expected for the full year.
	These condensed consolidated financial statements should be read in conjunction with the Company’s December 31, 2014 audited consolidated financial statements and accompanying notes thereto, which are included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 27, 2015.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and the notes to those statements. Actual results could differ from those estimates. The most significant estimates included within the financial statements are the allowance for doubtful accounts, the estimated useful lives and residual values on the rental fleet, property, plant and equipment, goodwill and other asset impairments and certain accrued liabilities.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. In April 2014, the Financial Accounting Standards Board (“FASB”) issued the accounting guidance on reporting discontinued operations and disclosures of disposals of components of an entity. The new guidance raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. The guidance is effective for fiscal years beginning after December 15, 2014. The Company will apply this guidance prospectively to transactions occurring after December 31, 2014.
	Revenue from Contracts with Customers. In May 2014, FASB issued the accounting standard on revenue from contracts with customers. The standard provides a single model for revenue arising from contracts with customers and supersedes current revenue recognition guidance. The standard requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of goods or services. The standard is effective for annual and interim periods beginning after December 15, 2016. Early adoption is not permitted. The revenue recognition standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the impact, if any, of the adoption of the standard to its financial statements and related disclosures. The Company has not yet selected a transition method nor determined the effect of the standard on its ongoing financial reporting.
	Simplifying the Presentation of Debt Issuance Costs. In April 2015, FASB issued accounting guidance on the presentation of debt issuance costs in the balance sheet. This standard requires 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 debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by this guidance. The Company will apply this guidance prospectively beginning in the fiscal year ended December 31, 2017. The application of this guidance will result in a reclassification of debt financing costs from other assets to a reduction of the specific debt liability, and will not affect the Company’s statement of operations or cash flow. As of March 31, 2015, the Company’s debt financing costs, net of accumulated amortization is $8.0 million.
Fair Value Measurements, Policy	The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the Company adopted the suggested accounting guidance for the three levels of inputs that may be used to measure fair value:
	Level 1 —	Observable inputs such as quoted prices in active markets for identical assets or liabilities;
	Level 2 —	Observable inputs, other than Level 1 inputs in active markets, that are observable either directly or indirectly; and
	Level 3 —	Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions.
Earnings Per Share	Basic (loss) earnings per share (“EPS”) is calculated by dividing net (loss) income by the weighted average number of common shares outstanding during the period. Diluted EPS is calculated under the treasury stock method. Potential common shares included nonvested share-awards, which is subject to risk of forfeiture, and incremental shares of common stock issuable upon the exercise of stock options.
Inventories	Inventories are valued at the lower of cost (principally on a standard cost basis which approximates the first-in, first-out (“FIFO”) method) or market. Market is the lower of replacement cost or net realizable value.
	Raw materials principally consist of raw steel, wood, glass, paint, vinyl and other assembly components used in manufacturing and remanufacturing processes, and to a lesser extent, parts used for internal maintenance, and ancillary items held for sale in our specialty containment segment. Work-in-process primarily represents partially assembled units pre-sold or for use as fleet. Finished portable storage units primarily represent purchased or assembled containers held in inventory until the container is either sold as is, remanufactured and sold, or remanufactured and deployed as rental fleet.
Rental Fleet, Policy	Rental fleet is capitalized at cost and depreciated over the estimated useful life of the unit using the straight-line method. Rental fleet is depreciated whether or not it is out on rent. Capitalized cost of rental fleet includes the price paid to acquire the unit and freight charges to the location when the unit is first placed in service, and when applicable, the cost of manufacturing or remanufacturing, which includes the cost of customizing units. Ordinary repair and maintenance costs are charged to operations as incurred.
	Management periodically reviews depreciable lives and residual values against various factors, including the results of its lenders’ independent appraisal of rental fleet, practices of competitors in comparable industries, profit margins achieved on sales of depreciated units and rental rates obtained on older units.
Property, Plant and Equipment	Property, plant and equipment are stated at cost, net of accumulated depreciation. Depreciation is provided using the straight-line method over the assets’ estimated useful lives. The Company’s depreciation expense related to property, plant and equipment for the three months ended March 31, 2015 and 2014 was $4.9 million and $3.5 million, respectively. Normal repairs and maintenance to property, plant and equipment are expensed as incurred. When property or equipment is retired or sold, the net book value of the asset, reduced by any proceeds, is charged to gain or loss on the disposal of property, plant and equipment and is included in rental, selling and general expenses in the Consolidated Statements of Operations. See Note 5 for information regarding the impairment of ancillary equipment related to wood mobile offices during the quarter ended March 31, 2015.
Income Tax Uncertainties, Policy	The Company uses a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement.
Segment Reporting, Policy	Prior to the ETS Acquisition, the Company’s operations were comprised of two reportable segments: North America and the U.K., both of which offer portable storage solutions. Discrete financial data on each of the Company’s products is not available and it would be impractical to collect and maintain financial data in such a manner. As a result of the ETS Acquisition, the Company established a new specialty containment reporting segment. Operations related to ETS are included in Mobile Mini’s consolidated results for the three months ended March 31, 2015.
	The results for each segment are reviewed discretely by senior management. Within their segment, locations generally have similar economic characteristics covering all products rented or sold, including customer base, sales personnel, advertising, yard facilities, general and administrative costs and field operations management.
	All of the Company’s locations operate in their local currency and, although the Company is exposed to foreign exchange rate fluctuation in foreign markets where the Company rents and sells its products, the Company does not believe such exposure will have a significant impact on its results of operations.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Carrying and Fair Value of Senior Notes	The carrying value and the fair value of the Company’s Senior Notes are as follows:
		March 31,		December 31,
		2015		2014
		(In thousands)
	Carrying value	$	200,000	$	200,000
	Fair value		211,000		206,000

Loss_Earnings_Per_Share_Tables

(Loss) Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Reconciliation of Net (Loss) Income and Weighted-Average Shares of Common Stock Outstanding for Purposes of Calculating Basic and Diluted Earnings Per Share	The following table is a reconciliation of net (loss) income and weighted-average shares of common stock outstanding for purposes of calculating basic and diluted EPS for the three months ended March 31:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands, except
			per share data)
	Numerator:
	Net (loss) income		$	(27,326	)	$	7,440
	Basic EPS Denominator:
	Common shares outstanding beginning of year			45,814			46,084
	Weighted shares issued (repurchased) during the period			(330	)		64
	Total weighted average shares outstanding			45,484			46,148
	Diluted EPS Denominator:
	Common shares outstanding beginning of year			45,814			46,084
	Net weighted shares issued (repurchased) during the period			(330	)		64
	Dilutive effect of stock options and nonvested share awards during the period (1)			—			689
	Total weighted average shares outstanding			45,484			46,837
	(Loss) earnings per share:
	Basic		$	(0.60	)	$	0.16
	Diluted			(0.60	)		0.16
	-1	Common stock equivalents of approximately 570,000 were excluded from the calculation of diluted earnings per share for the quarter ending March 31, 2015 because their inclusion would reduce the net loss per share.
Number of Stock Options and Nonvested Share-Awards that were Issued or Outstanding but were Excluded in Calculating Diluted Earnings Per Share Because their Effect would have been Anti-Dilutive	The following table represents the number of stock options and nonvested share-awards that were issued or outstanding but excluded in calculating diluted EPS because their effect would have been anti-dilutive for the quarters ended March 31:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands)
	Stock options			1,108			641
	Nonvested share-awards			—			—
	Total			1,108			641

Impairment_of_North_American_W1

Impairment of North American Wood Mobile Offices (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Assets Impaired and Impairment Loss Recognized	Based on this review, management determined that the assets were impaired as of March 31, 2015 and an impairment loss, was recognized in the amount by which the carrying amount of the asset group exceeded the estimated fair value as follows:
		March 31,
		2015
		(In thousands)
	Estimated fair market value	$	92,000
	Net book value:
	Wood mobile offices in rental fleet		155,558
	Ancillary items in property, plant and equipment		1,168
	Impairment loss	$	(64,726	)

Acquisition_Tables

Acquisition (Tables)	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Schedule of Components of Purchase Price and Net Assets Acquired	The components of the purchase price and net assets acquired during the three months ended March 31, 2015 are as follows (in thousands):
	Net Assets Acquired:
	Rental fleet	$	991
	Intangible assets:
	Customer relationships		57
	Non-compete agreements		24
	Goodwill		128
	Total purchase price	$	1,200

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories at March 31, 2015 and December 31, 2014 consisted of the following:
		March 31,		December 31,
		2015		2014
		(In thousands)
	Raw materials and supplies	$	14,569	$	14,241
	Work-in-process		212		201
	Finished portable storage units		1,737		2,294
	Inventories	$	16,518	$	16,736

Rental_Fleet_Tables

Rental Fleet (Tables)	3 Months Ended
	Mar. 31, 2015
Text Block [Abstract]
Rental Fleet	Rental fleet consisted of the following at March 31, 2015 and December 31, 2014:
			Residual Value			Useful Life	March 31,			December 31,
			as Percentage of			in Years	2015			2014
			Original Cost (1)
							(In thousands)
	Portable Storage:
	Steel storage containers			55	%	30	$	602,360		$	604,547
	Ground level offices			55	%	30		330,891			329,565
	Wood mobile offices			50	%	20		143,894			208,529
	Other							5,230			5,633
	Total							1,082,375			1,148,274
	Accumulated depreciation							(186,209	)		(182,437	)
	Total portable storage fleet, net						$	896,166		$	965,837
	Specialty Containment:
	Steel tanks					25	$	52,031		$	50,843
	Roll-off boxes					15 - 20		23,247			19,820
	Stainless steel tank trailers					25		8,189			7,667
	Vacuum boxes					20		23,287			23,283
	De-watering boxes					20		4,271			3,898
	Pumps and filtration equipment					7		11,655			11,510
	Other							5,954			5,468
	Total							128,634			122,489
	Accumulated depreciation							(5,137	)		(1,270	)
	Total specialty containment fleet, net						$	123,497		$	121,219
	Total rental fleet, net						$	1,019,663		$	1,087,056
	-1	Specialty containment fleet has been assigned zero residual value.

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment at March 31, 2015 and December 31, 2014 consisted of the following:
			Residual Value	Useful Life	March 31,			December 31,
			as Percentage of	in Years	2015			2014
			Original Cost
					(In thousands)
	Land				$	10,848		$	10,920
	Vehicles and machinery		0 - 55%	5 - 30		114,860			114,150
	Buildings and improvements (1)		0 - 25	3 - 30		19,489			19,365
	Office fixtures and equipment		0	3 - 5		35,198			33,942
	Property, plant and equipment					180,395			178,377
	Accumulated depreciation					(63,660	)		(65,202	)
	Property, plant and equipment, net				$	116,735		$	113,175
	-1	Improvements made to leased properties are amortized over the lesser of the estimated remaining life or the remaining term of the respective lease.

Goodwill_and_Intangibles_Table

Goodwill and Intangibles (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Activity and Balances Relating to Goodwill	The following table shows the activity and balances related to goodwill from January 1, 2015 to March 31, 2015:
		(In thousands)
	Balance at January 1, 2015	$	705,608
	Acquisition		128
	Foreign currency		(3,318	)
	Adjustments		919
	Balance at March 31, 2015	$	703,337
Balances Related to Intangible Assets	The following table reflects balances related to intangible assets for the periods presented:
				March 31, 2015							December 31, 2014
		Estimated		Gross		Accumulated			Net		Gross		Accumulated			Net
		Useful		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Life		Amount					Amount		Amount					Amount
				(In thousands)
	Customer relationships	11 - 20		$	91,642	$	(21,294	)	$	70,348	$	91,990	$	(20,484	)	$	71,506
	Trade names/trademarks	1 - 5			6,027		(1,078	)		4,949		6,065		(919	)		5,146
	Non-compete agreements	2 - 5			1,796		(167	)		1,629		1,772		(78	)		1,694
	Other	1 - 19			60		(21	)		39		61		(22	)		39
	Total			$	99,525	$	(22,560	)	$	76,965	$	99,888	$	(21,503	)	$	78,385
Schedule of Expected Future Amortization of Intangible Assets	Based on the carrying value at March 31, 2015, future amortization of intangible assets is expected to be as follows for the years ended December 31 (in thousands):
	2015 (remaining)	$	4,387
	2016		5,931
	2017		5,921
	2018		5,973
	2019		6,011
	Thereafter		48,742
	Total	$	76,965

Sharebased_Compensation_Tables

Share-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Key Assumptions Used to Estimate Fair Value of Stock Options Granted	The following are the key assumptions used for options granted during the three month periods ended March 31:
		2015		2014
	Risk-free interest rate	1.3% - 1.5%			1.5	%
	Expected life of the options (years)	5			5
	Expected stock price volatility	35.6% - 35.7%			38.4	%
	Expected dividend rate	1.8% - 2.0%			1.6	%
Stock Option Activity	The following table summarizes stock option activity for the three months ended March 31, 2015 (share amounts in thousands):
		Number of				Weighted
		Shares				Average
						Exercise Price
	Options outstanding, beginning of period		2,649			$	32.33
	Granted		363				42.8
	Canceled/Expired		(16	)			45.72
	Exercised		(1	)			25.43
	Options outstanding, end of period		2,995				33.53
Fully Vested Stock Options and Stock Options Expected to Vest	A summary of stock options outstanding as of March 31, 2015, is as follows:
		Number of				Weighted		Weighted		Aggregate
		Shares				Average		Average		Intrinsic
						Exercise		Remaining		Value
						Price		Contractual
								Terms
		(In thousands)						(In years)		(In thousands)
	Outstanding		2,995			$	33.53		8.11	$	28,595
	Vested and expected to vest		2,887				33.28		8.07		28,242
	Exercisable		1,659				30.8		7.68		19,997
Nonvested Share-Awards Activity	A summary of nonvested share-awards activity is as follows (share amounts in thousands):
		Shares				Weighted Average
						Grant Date Fair
						Value
	Nonvested at beginning of period		343			$	27.99
	Awarded		81				37.22
	Released		(29	)			34.78
	Forfeited		(11	)			24.14
	Nonvested at end of period		384				29.57

Restructuring_Costs_Tables

Restructuring Costs (Tables)	3 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Accrued Restructuring Obligations and Related Activity	The following table details accrued restructuring obligations (included in accrued liabilities in the Consolidated Balance Sheets) and related activity for the year ended December 31, 2014 and the three-month period ended March 31, 2015.
			Severance			Lease			Other			Total
			and			Abandonment			Costs
			Benefits			Costs
			(In thousands)
	Accrued obligations as of January 1, 2014		$	613		$	1,063		$	—		$	1,676
	Restructuring expense			1,826			318			1,398			3,542
	Settlement of obligations			(1,998	)		(705	)		(1,398	)		(4,101	)
	Accrued obligations as of December 31, 2014			441			676			—			1,117
	Restructuring expense			464			19			—			483
	Settlement of obligations			(157	)		(61	)		—			(218	)
	Accrued obligations as of March 31, 2015		$	748		$	634		$	—		$	1,382
Restructuring Expense	The following amounts are included in restructuring expense for the periods indicated:
			Three Months Ended
			March 31,
			2015			2014
			(In thousands)
	Severance and benefits		$	464		$	340
	Lease abandonment costs			19			139
	Other costs (1)			—			106
	Restructuring expenses		$	483		$	585
	-1	Other costs for 2014 include the sale of the Company’s Belfast, Northern Ireland location.

Segment_Reporting_Tables

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Reporting	The following tables set forth certain information regarding each of the Company’s segments for the three month periods ended March 31, 2015 and 2014.
		For the Three Months Ended March 31, 2015
		Portable Storage
		North			United		Total			Specialty		Consolidated
		America			Kingdom					Containment
		(In thousands)
	Revenues:
	Rental	$	78,984		$	20,020	$	99,004		$	22,024	$	121,028
	Sales		4,983			979		5,962			762		6,724
	Other		1,439			90		1,529			3,348		4,877
	Total revenues		85,406			21,089		106,495			26,134		132,629
	Costs and expenses:
	Rental, selling and general expenses		53,580			13,652		67,232			16,750		83,982
	Cost of sales		3,122			742		3,864			333		4,197
	Restructuring expenses		217			—		217			266		483
	Asset impairment charge, net		64,726			—		64,726			—		64,726
	Depreciation and amortization		7,890			1,576		9,466			6,073		15,539
	Total costs and expenses		129,535			15,970		145,505			23,422		168,927
	(Loss) income from operations	$	(44,129	)	$	5,119	$	(39,010	)	$	2,712	$	(36,298	)
	Interest expense, net of interest income	$	6,149		$	218	$	6,367		$	2,692	$	9,059
	Income tax (benefit) provision		(18,998	)		959		(18,039	)		8		(18,031	)
		For the Three Months Ended March 31, 2014
		Portable Storage
		North			United		Total			Specialty		Consolidated
		America			Kingdom					Containment
		(In thousands)
	Revenues:
	Rental	$	75,483		$	18,597	$	94,080		$	—	$	94,080
	Sales		6,578			1,288		7,866			—		7,866
	Other		354			104		458			—		458
	Total revenues		82,415			19,989		102,404			—		102,404
	Costs and expenses:
	Rental, selling and general expenses		54,707			13,649		68,356			—		68,356
	Cost of sales		4,590			963		5,553			—		5,553
	Restructuring expenses		397			188		585			—		585
	Asset impairment charge, net		159			124		283			—		283
	Depreciation and amortization		7,418			1,727		9,145			—		9,145
	Total costs and expenses		67,271			16,651		83,922			—		83,922
	Income from operations	$	15,144		$	3,338	$	18,482		$	—	$	18,482
	Interest expense, net of interest income	$	6,717		$	270	$	6,987		$	—	$	6,987
	Income tax provision		3,299			755		4,054			—		4,054
Assets Segments	Assets related to the Company’s segments include the following:
		Portable Storage
		North			United		Total			Specialty		Consolidated
		America			Kingdom					Containment
		(In thousands)
	As of March 31, 2015:
	Goodwill	$	458,852		$	61,634	$	520,486		$	182,851	$	703,337
	Intangibles		1,912			618		2,530			74,435		76,965
	Rental Fleet		755,434			140,732		896,166			123,497		1,019,663
	Property Plant and Equipment		87,153			15,511		102,664			14,071		116,735
	As of December 31, 2014:
	Goodwill	$	459,234		$	64,402	$	523,636		$	181,972	$	705,608
	Intangibles		2,119			651		2,770			75,615		78,385
	Rental Fleet		825,158			140,679		965,837			121,219		1,087,056
	Property Plant and Equipment		82,514			16,488		99,002			14,173		113,175

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Information (Tables)	3 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Balance Sheets	The following tables reflect the condensed consolidating financial information of the Company’s subsidiary guarantors of the Senior Notes and its non-guarantor subsidiaries. Separate financial statements of the subsidiary guarantors are not presented because the guarantee by each 100% owned subsidiary guarantor is full and unconditional, joint and several, subject to customary exceptions, and management has determined that such information is not material to investors.
	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING BALANCE SHEETS
	As of March 31, 2015
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	ASSETS
	Cash and cash equivalents	$	1,980		$	1,068		$	—		$	3,048
	Receivables, net		60,310			18,694			—			79,004
	Inventories		15,447			1,071			—			16,518
	Rental fleet, net		868,049			151,614			—			1,019,663
	Property, plant and equipment, net		100,180			16,555			—			116,735
	Deposits and prepaid expenses		6,442			1,059			—			7,501
	Deferred financing costs, net and other assets		8,173			—			—			8,173
	Intangibles, net		76,259			706			—			76,965
	Goodwill		636,863			66,474			—			703,337
	Intercompany receivables		144,313			33,670			(177,983	)		—
	Total assets	$	1,918,016		$	290,911		$	(177,983	)	$	2,030,944
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Liabilities:
	Accounts payable	$	20,531		$	9,934		$	—		$	30,465
	Accrued liabilities		57,658			6,932			—			64,590
	Lines of credit		697,533			3,848			—			701,381
	Obligations under capital leases		26,133			137			—			26,270
	Senior Notes		200,000			—			—			200,000
	Deferred income taxes		195,840			17,525			—			213,365
	Intercompany payables		—			92			(92	)		—
	Total liabilities		1,197,695			38,468			(92	)		1,236,071
	Commitments and contingencies
	Stockholders’ equity:
	Common stock		491			18,388			(18,388	)		491
	Additional paid-in capital		572,364			160,347			(160,347	)		572,364
	Retained earnings		228,426			115,355			844			344,625
	Accumulated other comprehensive loss		—			(41,647	)		—			(41,647	)
	Treasury stock, at cost		(80,960	)		—			—			(80,960	)
	Total stockholders’ equity		720,321			252,443			(177,891	)		794,873
	Total liabilities and stockholders’ equity	$	1,918,016		$	290,911		$	(177,983	)	$	2,030,944
	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING BALANCE SHEETS
	As of December 31, 2014
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	ASSETS
	Cash and cash equivalents	$	2,977		$	762		$	—		$	3,739
	Receivables, net		62,033			18,998			—			81,031
	Inventories		15,371			1,365			—			16,736
	Rental fleet, net		934,433			152,623			—			1,087,056
	Property, plant and equipment, net		95,509			17,666			—			113,175
	Deposits and prepaid expenses		7,375			1,211			—			8,586
	Deferred financing costs, net and other assets		8,858			—			—			8,858
	Intangibles, net		77,629			756			—			78,385
	Goodwill		635,943			69,665			—			705,608
	Intercompany receivables		145,018			33,971			(178,989	)		—
	Total assets	$	1,985,146		$	297,017		$	(178,989	)	$	2,103,174
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Liabilities:
	Accounts payable	$	14,803		$	8,130		$	—		$	22,933
	Accrued liabilities		56,104			7,623			—			63,727
	Lines of credit		702,135			3,383			—			705,518
	Obligations under capital leases		24,760			158			—			24,918
	Senior Notes		200,000			—			—			200,000
	Deferred income taxes		215,184			17,367			(1,004	)		231,547
Intercompany payables		—			94			(94	)		—
Total liabilities		1,212,986			36,755			(1,098	)		1,248,643
Commitments and contingencies
Stockholders’ equity:
Common stock		490			18,388			(18,388	)		490
Additional paid-in capital		569,083			160,347			(160,347	)		569,083
Retained earnings		268,263			111,397			844			380,504
Accumulated other comprehensive loss		—			(29,870	)		—			(29,870	)
Treasury stock, at cost		(65,676	)		—			—			(65,676	)
Total stockholders’ equity		772,160			260,262			(177,891	)		854,531
Total liabilities and stockholders’ equity	$	1,985,146		$	297,017		$	(178,989	)	$	2,103,174
Condensed Consolidating Statements of Operations	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS
	Three Months Ended March 31, 2015
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	Revenues:
	Rental	$	100,018		$	21,010		$	—		$	121,028
	Sales		5,669			1,055			—			6,724
	Other		4,787			90			—			4,877
	Total revenues		110,474			22,155			—			132,629
	Costs and expenses:
	Rental, selling and general expenses		69,610			14,372			—			83,982
	Cost of sales		3,401			796			—			4,197
	Restructuring expenses		483			—			—			483
	Asset impairment charge		64,726			—			—			64,726
	Depreciation and amortization		13,848			1,691			—			15,539
	Total costs and expenses		152,068			16,859			—			168,927
	(Loss) income from operations		(41,594	)		5,296			—			(36,298	)
	Other income (expense):
	Interest income		2,662			—			(2,662	)		—
	Interest expense		(11,343	)		(378	)		2,662			(9,059	)
	(Loss) income before income tax provision		(50,275	)		4,918			—			(45,357	)
	Income tax (benefit) provision		(18,991	)		960			—			(18,031	)
	Net (loss) income	$	(31,284	)	$	3,958		$	—		$	(27,326	)
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS
	Three Months Ended March 31, 2014
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	Revenues:
	Rental	$	74,268		$	19,812		$	—		$	94,080
	Sales		6,527			1,339			—			7,866
	Other		351			107			—			458
	Total revenues		81,146			21,258			—			102,404
	Costs and expenses:
	Cost of sales		4,552			1,001			—			5,553
	Rental, selling and general expenses		53,708			14,648			—			68,356
	Restructuring expenses		397			188			—			585
	Asset impairment charge, net		136			147			—			283
	Depreciation and amortization		7,277			1,868			—			9,145
	Total costs and expenses		66,070			17,852			—			83,922
	Income from operations		15,076			3,406			—			18,482
	Other income (expense):
	Interest income		30			—			(30	)		—
	Interest expense		(6,599	)		(418	)		30			(6,987	)
	Foreign currency exchange		—			(1	)		—			(1	)
	Income before income tax provision		8,507			2,987			—			11,494
	Income tax provision		3,299			755			—			4,054
	Net income	$	5,208		$	2,232		$	—		$	7,440
Condensed Consolidating Statements of Comprehensive (Loss) Income	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
	Three Months Ended March 31, 2015
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	Net (loss) income	$	(31,284	)	$	3,958		$	—		$	(27,326	)
	Foreign currency translation adjustment		—			(11,777	)		—			(11,777	)
	Comprehensive loss	$	(31,284	)	$	(7,819	)	$	—		$	(39,103	)
	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME
	Three Months Ended March 31, 2014
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	Net income	$	5,208		$	2,232		$	—		$	7,440
	Foreign currency translation adjustment		—			1,180			—			1,180
	Comprehensive income	$	5,208		$	3,412		$	—		$	8,620
Condensed Consolidating Statements of Cash Flows	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Three Months Ended March 31, 2015
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	Cash Flows from Operating Activities:
	Net income	$	(31,284	)	$	3,958		$	—		$	(27,326	)
	Adjustments to reconcile net income to net cash provided by operating activities:
	Asset impairment charge		64,726			—			—			64,726
	Provision for doubtful accounts		947			222			—			1,169
	Amortization of deferred financing costs		775			14			—			789
	Amortization of long-term liabilities		25			—			—			25
	Share-based compensation expense		3,160			90			—			3,250
	Depreciation and amortization		13,848			1,691			—			15,539
	Gain on sale of rental fleet units		(1,826	)		(146	)		—			(1,972	)
	Loss on disposal of property, plant and equipment		219			116			—			335
	Deferred income taxes		(19,192	)		959			—			(18,233	)
	Changes in certain assets and liabilities, net of effect of businesses acquired:
	Receivables		188			(824	)		—			(636	)
	Inventories		(75	)		232			—			157
	Deposits and prepaid expenses		348			98			—			446
	Other assets and intangibles		9			—			—			9
	Accounts payable		751			282			—			1,033
	Accrued liabilities		(467	)		(372	)		—			(839	)
	Intercompany		683			(844	)		161			—
	Net cash provided by operating activities		32,835			5,476			161			38,472
	Cash Flows from Investing Activities:
	Cash paid for businesses, net of cash acquired		—			(1,200	)		—			(1,200	)
	Additions to rental fleet		(5,745	)		(4,735	)		—			(10,480	)
	Proceeds from sale of rental fleet units		4,268			574			—			4,842
	Additions to property, plant and equipment		(3,307	)		(934	)		—			(4,241	)
	Proceeds from sale of property, plant and equipment		243			364			—			607
	Net cash used in investing activities		(4,541	)		(5,931	)		—			(10,472	)
	Cash Flows from Financing Activities:
	Net borrowings (repayments) under lines of credit		(4,602	)		619			(154	)		(4,137	)
	Deferred financing costs		(100	)		—			—			(100	)
	Principal payments on capital lease obligations		(828	)		(14	)		(7	)		(849	)
	Issuance of common stock		32			—			—			32
	Dividend payments		(8,509	)		—			—			(8,509	)
	Purchase of treasury stock		(15,284	)		—			—			(15,284	)
	Net cash (used in) provided by financing activities		(29,291	)		605			(161	)		(28,847	)
	Effect of exchange rate changes on cash		—			156			—			156
	Net (decrease) increase in cash		(997	)		306			—			(691	)
	Cash and cash equivalents at beginning of period		2,977			762			—			3,739
	Cash and cash equivalents at end of period	$	1,980		$	1,068		$	—		$	3,048
	MOBILE MINI, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Three Months Ended March 31, 2014
	(In thousands)
		Guarantors			Non-			Eliminations			Consolidated
					Guarantors
	Cash Flows from Operating Activities:
	Net income	$	5,208		$	2,232		$	—		$	7,440
	Adjustments to reconcile net income to net cash provided by operating activities:
	Asset impairment charge, net		136			147			—			283
	Provision for doubtful accounts		453			94			—			547
	Amortization of deferred financing costs		687			16			—			703
	Amortization of long-term liabilities		40			1			—			41
	Share-based compensation expense		3,963			201			—			4,164
	Depreciation and amortization		7,277			1,868			—			9,145
	Gain on sale of rental fleet units		(1,500	)		(211	)		—			(1,711	)
	Loss on disposal of property, plant and equipment		48			24			—			72
	Deferred income taxes		3,201			753			—			3,954
Foreign currency loss		—			1			—			1
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables		1,404			(626	)		—			778
Inventories		285			(57	)		—			228
Deposits and prepaid expenses		(1,416	)		140			—			(1,276	)
Other assets and intangibles		(178	)		173			—			(5	)
Accounts payable		1,123			1,938			—			3,061
Accrued liabilities		(350	)		(263	)		—			(613	)
Intercompany		756			(756	)		—			—
Net cash provided by operating activities		21,137			5,675			—			26,812
Cash Flows from Investing Activities:
Cash paid for businesses, net of cash acquired		(4,217	)		—			—			(4,217	)
Additions to rental fleet		(1,834	)		(2,244	)		—			(4,078	)
Proceeds from sale of rental fleet units		4,781			846			—			5,627
Additions to property, plant and equipment		(2,393	)		(235	)		—			(2,628	)
Proceeds from sale of property, plant and equipment		708			200			—			908
Net cash used in investing activities		(2,955	)		(1,433	)		—			(4,388	)
Cash Flows from Financing Activities:
Net repayments under lines of credit		(10,773	)		(5,534	)		—			(16,307	)
Principal payments on capital lease obligations		(367	)		—			—			(367	)
Issuance of common stock		1,949			—			—			1,949
Dividend payments		(7,849	)		—			—			(7,849	)
Purchase of treasury stock		(407	)		—			—			(407	)
Net cash used in financing activities		(17,447	)		(5,534	)		—			(22,981	)
Effect of exchange rate changes on cash		—			(132	)		—			(132	)
Net increase (decrease) in cash		735			(1,424	)		—			(689	)
Cash and cash equivalents at beginning of period		(190	)		1,446			—			1,256
Cash and cash equivalents at end of period	$	545		$	22		$	—		$	567

Mobile_Mini_Organization_and_D2

Mobile Mini, Organization and Description of Business - Additional Information (Detail)	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Percentage of ownership owned	100.00%

Recent_Accounting_Pronouncemen1

Recent Accounting Pronouncements - Additional Information (Detail) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Deferred Costs [Abstract]
Debt financing costs, net of accumulated amortization	$8

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, face amount	$200
Debt instrument interest rate	7.88%
Debt instrument due year	2020
Senior Notes 7.875 Percent Due 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes fair value basis for measurement, description	The fair value of the Company's $200.0 million aggregate principal amount of 7.875% senior notes due 2020 (the "2020 Notes" or the "Senior Notes") is based on their latest sales price at the end of each period obtained from a third-party institution and is considered Level 2 in the fair value hierarchy, as there is not an active market for these notes.

Carrying_and_Fair_Value_of_Sen

Carrying and Fair Value of Senior Notes (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Carrying value	$200,000	$200,000
Senior Notes 7.875 Percent Due 2020
Debt Instrument [Line Items]
Carrying value	200,000	200,000
Fair value	$211,000	$206,000

Reconciliation_of_Net_loss_Inc

Reconciliation of Net (loss) Income and Weighted-Average Shares of Common Stock Outstanding for Purposes of Calculating Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net (loss) income	($27,326)	$7,440
Basic EPS Denominator:
Common shares outstanding beginning of year	45,814	46,084
Weighted shares issued (repurchased) during the period	-330	64
Total weighted average shares outstanding	45,484	46,148
Diluted EPS Denominator:
Common shares outstanding beginning of year	45,814	46,084
Net weighted shares issued (repurchased) during the period	-330	64
Dilutive effect of stock options and nonvested share awards during the period		689	[1]
Total weighted average shares outstanding	45,484	46,837
(Loss) earnings per share:
Basic	($0.60)	$0.16
Diluted	($0.60)	$0.16
[1]	Common stock equivalents of approximately 570,000 were excluded from the calculation of diluted earnings per share for the quarter ending March 31, 2015 because their inclusion would reduce the net loss per share.

Reconciliation_of_Net_loss_Inc1

Reconciliation of Net (loss) Income and Weighted-Average Shares of Common Stock Outstanding for Purposes of Calculating Basic and Diluted Earnings Per Share (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share Disclosure [Line Items]
Common stock equivalents excluded from the calculation of diluted earnings per share	1,108,000	641,000
Common Stock Equivalents
Earnings Per Share Disclosure [Line Items]
Common stock equivalents excluded from the calculation of diluted earnings per share	570,000

Loss_Earnings_Per_Share_Additi

(Loss) Earnings Per Share - Additional Information (Detail)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Nonvested share-awards not included in basic weighted average number of common shares outstanding	0.4	0.5

Number_of_Stock_Options_and_No

Number of Stock Options and Nonvested Share-Awards that were Issued or Outstanding but were Excluded in Calculating Diluted Earnings Per Share Because their Effect would have been Anti-Dilutive (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of dilutive EPS	1,108,000	641,000
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from the computation of dilutive EPS	1,108,000	641,000

Schedule_of_Assets_Impaired_an

Schedule of Assets Impaired and Impairment Loss Recognized (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Long Lived Assets Held-for-sale [Line Items]
Estimated fair market value	$92,000
Property, plant and equipment, net	116,735		113,175
Impairment loss	-64,726	-283
Wood mobile offices in rental fleet
Long Lived Assets Held-for-sale [Line Items]
Property, plant and equipment, net	155,558
Ancillary items in property, plant and equipment
Long Lived Assets Held-for-sale [Line Items]
Property, plant and equipment, net	$1,168

Acquisition_Additional_Informa

Acquisition - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Entity
Business Combinations [Abstract]
Number of business acquired	1

Schedule_of_Components_of_Purc

Schedule of Components of Purchase Price and Net Assets Acquired (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Net Assets Acquired:
Rental fleet	$991
Intangible assets:
Goodwill	128
Total purchase price	1,200
Customer relationships
Intangible assets:
Intangible assets	57
Non-compete agreements
Intangible assets:
Intangible assets	$24

Inventories_Detail

Inventories (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials and supplies	$14,569	$14,241
Work-in-process	212	201
Finished portable storage units	1,737	2,294
Inventories	$16,518	$16,736

Rental_Fleet_Additional_Inform

Rental Fleet - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, net	$1,019,663,000		$1,087,056,000
Depreciation expense	9,200,000	5,300,000
Portable Storage
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, net	896,166,000		965,837,000
Specialty Containment
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, net	$123,497,000		$121,219,000

Rental_Fleet_Detail

Rental Fleet (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Property Subject to or Available for Operating Lease [Line Items]
Total fleet, net	$1,019,663		$1,087,056
Portable Storage
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, gross	1,082,375		1,148,274
Accumulated depreciation	-186,209		-182,437
Total fleet, net	896,166		965,837
Portable Storage | Steel storage containers
Property Subject to or Available for Operating Lease [Line Items]
Residual Value as Percentage of Original Cost	55.00%	[1]
Useful Life in Years	30 years
Rental fleet, gross	602,360		604,547
Portable Storage | Ground level offices
Property Subject to or Available for Operating Lease [Line Items]
Residual Value as Percentage of Original Cost	55.00%	[1]
Useful Life in Years	30 years
Rental fleet, gross	330,891		329,565
Portable Storage | Wood mobile offices
Property Subject to or Available for Operating Lease [Line Items]
Residual Value as Percentage of Original Cost	50.00%	[1]
Useful Life in Years	20 years
Rental fleet, gross	143,894		208,529
Portable Storage | Other
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, gross	5,230		5,633
Specialty Containment
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, gross	128,634		122,489
Accumulated depreciation	-5,137		-1,270
Total fleet, net	123,497		121,219
Specialty Containment | Other
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, gross	5,954		5,468
Specialty Containment | Steel tanks
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	25 years
Rental fleet, gross	52,031		50,843
Specialty Containment | Roll-off boxes
Property Subject to or Available for Operating Lease [Line Items]
Rental fleet, gross	23,247		19,820
Specialty Containment | Roll-off boxes | Minimum
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	15 years
Specialty Containment | Roll-off boxes | Maximum
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	20 years
Specialty Containment | Stainless steel tank trailers
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	25 years
Rental fleet, gross	8,189		7,667
Specialty Containment | Vacuum Boxes
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	20 years
Rental fleet, gross	23,287		23,283
Specialty Containment | De-watering boxes
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	20 years
Rental fleet, gross	4,271		3,898
Specialty Containment | Pumps and filtration equipment
Property Subject to or Available for Operating Lease [Line Items]
Useful Life in Years	7 years
Rental fleet, gross	$11,655		$11,510
[1]	Specialty containment fleet has been assigned zero residual value.

Rental_Fleet_Parenthetical_Det

Rental Fleet (Parenthetical) (Detail) (Specialty Containment, USD $)	Mar. 31, 2015
Specialty Containment
Property Subject to or Available for Operating Lease [Line Items]
Residual value	$0

Property_Plant_and_Equipment_A

Property, Plant and Equipment - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Property, Plant and Equipment [Abstract]
Depreciation expense	$4.90	$3.50

Property_Plant_and_Equipment_D

Property, Plant and Equipment (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land	10,848		$10,920
Vehicles and machinery	114,860		114,150
Buildings and improvements	19,489	[1]	19,365	[1]
Office fixtures and equipment	35,198		33,942
Property, plant and equipment	180,395		178,377
Accumulated depreciation	-63,660		-65,202
Property, plant and equipment, net	116,735		$113,175
Vehicles and machinery | Minimum
Property, Plant and Equipment [Line Items]
Residual Value as Percentage of Original Cost	0.00%
Estimated useful life in years	5 years
Vehicles and machinery | Maximum
Property, Plant and Equipment [Line Items]
Residual Value as Percentage of Original Cost	55.00%
Estimated useful life in years	30 years
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Residual Value as Percentage of Original Cost	0.00%	[1]
Estimated useful life in years	3 years	[1]
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Residual Value as Percentage of Original Cost	25.00%	[1]
Estimated useful life in years	30 years	[1]
Office fixtures and equipment
Property, Plant and Equipment [Line Items]
Residual Value as Percentage of Original Cost	0.00%
Office fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life in years	3 years
Office fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life in years	5 years
Land
Property, Plant and Equipment [Line Items]
Residual Value as Percentage of Original Cost	0.00%
[1]	Improvements made to leased properties are amortized over the lesser of the estimated remaining life or the remaining term of the respective lease.

Goodwill_and_Intangibles_Addit

Goodwill and Intangibles - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Adjustments	$919,000
Amortization of all other intangibles	$1,500,000	$300,000

Activity_and_Balances_Relating

Activity and Balances Relating to Goodwill (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Beginning Balance	$705,608
Acquisition	128
Foreign currency	-3,318
Adjustments	919
Goodwill Ending Balance	$703,337

Balances_Related_to_Intangible

Balances Related to Intangible Assets (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	99,525	$99,888
Accumulated Amortization	-22,560	-21,503
Net Carrying Amount	76,965	78,385
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	91,642	91,990
Accumulated Amortization	-21,294	-20,484
Net Carrying Amount	70,348	71,506
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	11 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	20 years
Trade names/trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,027	6,065
Accumulated Amortization	-1,078	-919
Net Carrying Amount	4,949	5,146
Trade names/trademarks | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	1 year
Trade names/trademarks | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,796	1,772
Accumulated Amortization	-167	-78
Net Carrying Amount	1,629	1,694
Non-compete agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	2 years
Non-compete agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	60	61
Accumulated Amortization	-21	-22
Net Carrying Amount	39	$39
Other | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	1 year
Other | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	19 years

Schedule_of_Expected_Future_Am

Schedule of Expected Future Amortization of Intangible Assets (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015 (remaining)	$4,387
2016	5,931
2017	5,921
2018	5,973
2019	6,011
Thereafter	48,742
Net Carrying Amount	$76,965	$78,385

Lines_of_Credit_Additional_Inf

Lines of Credit - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015
Line of Credit Facility [Line Items]
Line of credit, pro forma excess borrowing availability for restricted payments and acquisitions to occur without financial covenants	$250,000,000
Line of credit, minimum borrowing availability for financial maintenance covenants to be applicable	100,000,000
Line of credit, covenant	Payment Conditions allow restricted payments and acquisitions to occur without financial covenants as long as the Company has $250.0 million of pro forma excess borrowing availability under the Credit Agreement.
Maximum
Line of Credit Facility [Line Items]
Percentage of net orderly liquidation value of lease-fleet to be included in determination of borrowing base	90.00%
LIBOR Loans
Line of Credit Facility [Line Items]
Revolving credit facility, margin rate	2.00%
LIBOR Loans | Maximum
Line of Credit Facility [Line Items]
Revolving credit facility, margin rate	2.25%
LIBOR Loans | Minimum
Line of Credit Facility [Line Items]
Revolving credit facility, margin rate	1.75%
Base Rate Loans
Line of Credit Facility [Line Items]
Revolving credit facility, margin rate	1.00%
Base Rate Loans | Maximum
Line of Credit Facility [Line Items]
Revolving credit facility, margin rate	1.25%
Base Rate Loans | Minimum
Line of Credit Facility [Line Items]
Revolving credit facility, margin rate	0.75%
$1.0 billion ABL Credit Agreement
Line of Credit Facility [Line Items]
Credit Agreement, borrowing capacity	$1,000,000,000
Credit Agreement, term	5 years
Credit Agreement, maturity date	22-Feb-17

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
Income Taxes [Line Items]
Tax year subject to tax examination for U.S. Federal return	For the U.S. Federal return, its tax years for 2011, 2012 and 2013 are subject to tax examination by the U.S. Internal Revenue Service through September 15, 2015, 2016 and 2017, respectively. The Company does not anticipate that the total amount of unrecognized tax benefit related to any particular tax position will change significantly within the next 12 months.
Internal Revenue Service (IRS) | Tax Year 2011
Income Taxes [Line Items]
U.S. Federal return, tax year subject to examination	2011
Internal Revenue Service (IRS) | Tax Year 2012
Income Taxes [Line Items]
U.S. Federal return, tax year subject to examination	2012
Internal Revenue Service (IRS) | Tax Year 2013
Income Taxes [Line Items]
U.S. Federal return, tax year subject to examination	2013
Minimum
Income Taxes [Line Items]
Step two threshold to quantify uncertain tax position	50.00%

Sharebased_Compensation_Additi

Share-based Compensation - Additional Information (Detail) (USD $)	3 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share available for future grants	2.5
Stock options contractual terms	8 years 1 month 10 days
Aggregate intrinsic value of options exercised	$23,000
Weighted average fair value of stock options granted	$8.42
Fair value of share-awards vested	1,000,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	10,100,000
Weighted average recognition period (years)	1 year 8 months 12 days
Nonvested share-awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$9,900,000
Weighted average recognition period (years)	2 years 7 months 6 days

Key_Assumptions_Used_to_Estima

Key Assumptions Used to Estimate Fair Value of Stock Options Granted (Detail) (Stock options)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate		1.50%
Expected life of the options (years)	5 years	5 years
Expected stock price volatility		38.40%
Expected dividend rate		1.60%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.30%
Expected stock price volatility	35.60%
Expected dividend rate	1.80%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.50%
Expected stock price volatility	35.70%
Expected dividend rate	2.00%

Stock_Option_Activity_Detail

Stock Option Activity (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015
Number of Shares
Options outstanding, beginning of period	2,649
Granted	363
Canceled/Expired	-16
Exercised	-1
Options outstanding, end of period	2,995
Weighted Average Exercise Price
Options outstanding, beginning of period	$32.33
Granted	$42.80
Canceled/Expired	$45.72
Exercised	$25.43
Options outstanding, end of period	$33.53

Fully_Vested_Stock_Options_and

Fully Vested Stock Options and Stock Options Expected to Vest (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Number of Shares
Outstanding	2,995	2,649
Vested and expected to vest	2,887
Exercisable	1,659
Weighted Average Exercise Price
Outstanding	$33.53	$32.33
Vested and expected to vest	$33.28
Exercisable	$30.80
Weighted Average Remaining Contractual Term (In years)
Outstanding	8 years 1 month 10 days
Vested and expected to vest	8 years 26 days
Exercisable	7 years 8 months 5 days
Aggregate Intrinsic Values
Outstanding	$28,595
Vested and expected to vest	28,242
Exercisable	$19,997

Nonvested_ShareAwards_Activity

Nonvested Share-Awards Activity (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015
Nonvested Stock Awards, shares
Nonvested at beginning of period, shares	343
Awarded	81
Released	-29
Forfeited	-11
Nonvested at end of period, shares	384
Weighted Average Grant Date Fair Value
Nonvested at beginning of period	$27.99
Awarded	$37.22
Released	$34.78
Forfeited	$24.14
Nonvested at end of period	$29.57

Accrued_Restructuring_Obligati

Accrued Restructuring Obligations and Related Activity (Detail) (USD $)	3 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014		Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Accrued obligations, beginning balance	$1,117	$1,676		$1,676
Restructuring expense	483	585		3,542
Settlement of obligations	-218			-4,101
Accrued obligations, ending balance	1,382			1,117
Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Accrued obligations, beginning balance	441	613		613
Restructuring expense	464	340		1,826
Settlement of obligations	-157			-1,998
Accrued obligations, ending balance	748			441
Lease Abandonment Costs
Restructuring Cost and Reserve [Line Items]
Accrued obligations, beginning balance	676	1,063		1,063
Restructuring expense	19	139		318
Settlement of obligations	-61			-705
Accrued obligations, ending balance	634			676
Other Costs
Restructuring Cost and Reserve [Line Items]
Accrued obligations, beginning balance
Restructuring expense		106	[1]	1,398
Settlement of obligations				-1,398
Accrued obligations, ending balance
[1]	Other costs for 2014 include the sale of the Company's Belfast, Northern Ireland location.

Restructuring_Expenses_Detail

Restructuring Expenses (Detail) (USD $)	3 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014		Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$483	$585		$3,542
Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	464	340		1,826
Lease Abandonment Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	19	139		318
Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses		$106	[1]	$1,398
[1]	Other costs for 2014 include the sale of the Company's Belfast, Northern Ireland location.

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 21, 2015	Nov. 06, 2013
Equity, Class of Treasury Stock [Line Items]
Dividend payable			$0.19
Dividend declared date	21-Jan-15
Dividend payable date	19-Mar-15
Stockholder of record date	5-Mar-15
Share repurchase program authorized amount				$125,000,000
Treasury stock value	15,284,000	407,000
Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Treasury stock shares acquired	387,000
Treasury stock value	15,000,000
Treasury stock shares available for repurchase	85,000,000
Minimum tax withholding obligations
Equity, Class of Treasury Stock [Line Items]
Treasury stock shares acquired	7,000
Treasury stock value	$276,000

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	Segment
Segment Reporting Information [Line Items]
Number of reportable segments	2
Revenues	$132,629	$102,404
Assets	2,030,944		2,103,174
United States
Segment Reporting Information [Line Items]
Revenues	110,500	81,100
Assets	$1,700,000		$1,700,000

Segment_Reporting_Detail

Segment Reporting (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Revenues:
Rental	$121,028	$94,080
Sales	6,724	7,866
Other	4,877	458
Total revenues	132,629	102,404
Costs and expenses:
Rental, selling and general expenses	83,982	68,356
Cost of sales	4,197	5,553
Restructuring expenses	483	585	3,542
Asset impairment charge, net	64,726	283
Depreciation and amortization	15,539	9,145
Total costs and expenses	168,927	83,922
(Loss) income from operations	-36,298	18,482
Interest expense, net of interest income	9,059	6,987
Income tax (benefit) provision	-18,031	4,054
Portable Storage
Revenues:
Rental	99,004	94,080
Sales	5,962	7,866
Other	1,529	458
Total revenues	106,495	102,404
Costs and expenses:
Rental, selling and general expenses	67,232	68,356
Cost of sales	3,864	5,553
Restructuring expenses	217	585
Asset impairment charge, net	64,726	283
Depreciation and amortization	9,466	9,145
Total costs and expenses	145,505	83,922
(Loss) income from operations	-39,010	18,482
Interest expense, net of interest income	6,367	6,987
Income tax (benefit) provision	-18,039	4,054
Portable Storage | North America
Revenues:
Rental	78,984	75,483
Sales	4,983	6,578
Other	1,439	354
Total revenues	85,406	82,415
Costs and expenses:
Rental, selling and general expenses	53,580	54,707
Cost of sales	3,122	4,590
Restructuring expenses	217	397
Asset impairment charge, net	64,726	159
Depreciation and amortization	7,890	7,418
Total costs and expenses	129,535	67,271
(Loss) income from operations	-44,129	15,144
Interest expense, net of interest income	6,149	6,717
Income tax (benefit) provision	-18,998	3,299
Portable Storage | United Kingdom
Revenues:
Rental	20,020	18,597
Sales	979	1,288
Other	90	104
Total revenues	21,089	19,989
Costs and expenses:
Rental, selling and general expenses	13,652	13,649
Cost of sales	742	963
Restructuring expenses		188
Asset impairment charge, net		124
Depreciation and amortization	1,576	1,727
Total costs and expenses	15,970	16,651
(Loss) income from operations	5,119	3,338
Interest expense, net of interest income	218	270
Income tax (benefit) provision	959	755
Specialty Containment
Revenues:
Rental	22,024
Sales	762
Other	3,348
Total revenues	26,134
Costs and expenses:
Rental, selling and general expenses	16,750
Cost of sales	333
Restructuring expenses	266
Depreciation and amortization	6,073
Total costs and expenses	23,422
(Loss) income from operations	2,712
Interest expense, net of interest income	2,692
Income tax (benefit) provision	$8

Assets_Segments_Detail

Assets Segments (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]
Goodwill	$703,337	$705,608
Intangibles	76,965	78,385
Rental Fleet	1,019,663	1,087,056
Property Plant and Equipment	116,735	113,175
Portable Storage
Revenues from External Customers and Long-Lived Assets [Line Items]
Goodwill	520,486	523,636
Intangibles	2,530	2,770
Rental Fleet	896,166	965,837
Property Plant and Equipment	102,664	99,002
Portable Storage | North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Goodwill	458,852	459,234
Intangibles	1,912	2,119
Rental Fleet	755,434	825,158
Property Plant and Equipment	87,153	82,514
Portable Storage | United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Goodwill	61,634	64,402
Intangibles	618	651
Rental Fleet	140,732	140,679
Property Plant and Equipment	15,511	16,488
Specialty Containment
Revenues from External Customers and Long-Lived Assets [Line Items]
Goodwill	182,851	181,972
Intangibles	74,435	75,615
Rental Fleet	123,497	121,219
Property Plant and Equipment	$14,071	$14,173

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 29, 2015	Apr. 16, 2015	Jan. 21, 2015	Dec. 31, 2014	Nov. 06, 2013	Apr. 30, 2015	Apr. 17, 2015
Subsequent Event [Line Items]
Proceeds from sale of rental fleet units	$4,842,000	$5,627,000
Impairment loss	64,726,000	283,000
Stock repurchase program, current amount							125,000,000
Treasury stock, at cost	80,960,000					65,676,000
Dividend payable					$0.19
Dividend payable date	19-Mar-15
Stockholder of record date	5-Mar-15
Subsequent Event
Subsequent Event [Line Items]
Increased value of shares under stock repurchase program									50,000,000
Stock repurchase program, current amount									175,000,000
Amount available for repurchase under stock repurchase program								135,000,000
Dividend payable			$0.19
Dividend payable date			3-Jun-15
Stockholder of record date			20-May-15
Subsequent Event | Share Repurchase Program
Subsequent Event [Line Items]
Treasury stock, at cost								40,000,000
Wood mobile offices
Subsequent Event [Line Items]
Definitive agreement date	16-Apr-15
Impairment loss	64,726,000
Expected timing of transaction	The transaction is expected to be completed in May 2015
Wood mobile offices | Subsequent Event | Scenario Plan
Subsequent Event [Line Items]
Proceeds from sale of rental fleet units				92,000,000
Divestiture-related expenses				2,000,000
Deferred revenue				$6,600,000

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Information - Additional Information (Detail)	Mar. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Percentage of ownership owned	100.00%

Condensed_Consolidating_Balanc

Condensed Consolidating Balance Sheets (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
ASSETS
Cash and cash equivalents	$3,048	$3,739	$567	$1,256
Receivables, net	79,004	81,031
Inventories	16,518	16,736
Rental fleet, net	1,019,663	1,087,056
Property, plant and equipment, net	116,735	113,175
Deposits and prepaid expenses	7,501	8,586
Deferred financing costs, net and other assets	8,173	8,858
Intangibles, net	76,965	78,385
Goodwill	703,337	705,608
Total assets	2,030,944	2,103,174
Liabilities:
Accounts payable	30,465	22,933
Accrued liabilities	64,590	63,727
Lines of credit	701,381	705,518
Obligations under capital leases	26,270	24,918
Senior Notes	200,000	200,000
Deferred income taxes	213,365	231,547
Total liabilities	1,236,071	1,248,643
Commitments and contingencies
Stockholders' equity:
Common stock	491	490
Additional paid-in capital	572,364	569,083
Retained earnings	344,625	380,504
Accumulated other comprehensive loss	-41,647	-29,870
Treasury stock, at cost	-80,960	-65,676
Total stockholders' equity	794,873	854,531
Total liabilities and stockholders' equity	2,030,944	2,103,174
Eliminations
ASSETS
Intercompany receivables	-177,983	-178,989
Total assets	-177,983	-178,989
Liabilities:
Deferred income taxes		-1,004
Intercompany payables	-92	-94
Total liabilities	-92	-1,098
Commitments and contingencies
Stockholders' equity:
Common stock	-18,388	-18,388
Additional paid-in capital	-160,347	-160,347
Retained earnings	844	844
Total stockholders' equity	-177,891	-177,891
Total liabilities and stockholders' equity	-177,983	-178,989
Guarantors
ASSETS
Cash and cash equivalents	1,980	2,977	545	-190
Receivables, net	60,310	62,033
Inventories	15,447	15,371
Rental fleet, net	868,049	934,433
Property, plant and equipment, net	100,180	95,509
Deposits and prepaid expenses	6,442	7,375
Deferred financing costs, net and other assets	8,173	8,858
Intangibles, net	76,259	77,629
Goodwill	636,863	635,943
Intercompany receivables	144,313	145,018
Total assets	1,918,016	1,985,146
Liabilities:
Accounts payable	20,531	14,803
Accrued liabilities	57,658	56,104
Lines of credit	697,533	702,135
Obligations under capital leases	26,133	24,760
Senior Notes	200,000	200,000
Deferred income taxes	195,840	215,184
Total liabilities	1,197,695	1,212,986
Commitments and contingencies
Stockholders' equity:
Common stock	491	490
Additional paid-in capital	572,364	569,083
Retained earnings	228,426	268,263
Treasury stock, at cost	-80,960	-65,676
Total stockholders' equity	720,321	772,160
Total liabilities and stockholders' equity	1,918,016	1,985,146
Non-Guarantors
ASSETS
Cash and cash equivalents	1,068	762	22	1,446
Receivables, net	18,694	18,998
Inventories	1,071	1,365
Rental fleet, net	151,614	152,623
Property, plant and equipment, net	16,555	17,666
Deposits and prepaid expenses	1,059	1,211
Intangibles, net	706	756
Goodwill	66,474	69,665
Intercompany receivables	33,670	33,971
Total assets	290,911	297,017
Liabilities:
Accounts payable	9,934	8,130
Accrued liabilities	6,932	7,623
Lines of credit	3,848	3,383
Obligations under capital leases	137	158
Deferred income taxes	17,525	17,367
Intercompany payables	92	94
Total liabilities	38,468	36,755
Commitments and contingencies
Stockholders' equity:
Common stock	18,388	18,388
Additional paid-in capital	160,347	160,347
Retained earnings	115,355	111,397
Accumulated other comprehensive loss	-41,647	-29,870
Total stockholders' equity	252,443	260,262
Total liabilities and stockholders' equity	$290,911	$297,017

Condensed_Consolidating_Statem

Condensed Consolidating Statements of Operations (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Revenues:
Rental	$121,028	$94,080
Sales	6,724	7,866
Other	4,877	458
Total revenues	132,629	102,404
Costs and expenses:
Cost of sales	4,197	5,553
Rental, selling and general expenses	83,982	68,356
Restructuring expenses	483	585	3,542
Asset impairment charge, net	64,726	283
Depreciation and amortization	15,539	9,145
Total costs and expenses	168,927	83,922
(Loss) income from operations	-36,298	18,482
Other income (expense):
Interest expense	-9,059	-6,987
Foreign currency exchange		-1
(Loss) income before income tax (benefit) provision	-45,357	11,494
Income tax (benefit) provision	-18,031	4,054
Net (loss) income	-27,326	7,440
Eliminations
Other income (expense):
Interest income	-2,662	-30
Interest expense	2,662	30
Guarantors
Revenues:
Rental	100,018	74,268
Sales	5,669	6,527
Other	4,787	351
Total revenues	110,474	81,146
Costs and expenses:
Cost of sales	3,401	4,552
Rental, selling and general expenses	69,610	53,708
Restructuring expenses	483	397
Asset impairment charge, net	64,726	136
Depreciation and amortization	13,848	7,277
Total costs and expenses	152,068	66,070
(Loss) income from operations	-41,594	15,076
Other income (expense):
Interest income	2,662	30
Interest expense	-11,343	-6,599
(Loss) income before income tax (benefit) provision	-50,275	8,507
Income tax (benefit) provision	-18,991	3,299
Net (loss) income	-31,284	5,208
Non-Guarantors
Revenues:
Rental	21,010	19,812
Sales	1,055	1,339
Other	90	107
Total revenues	22,155	21,258
Costs and expenses:
Cost of sales	796	1,001
Rental, selling and general expenses	14,372	14,648
Restructuring expenses		188
Asset impairment charge, net		147
Depreciation and amortization	1,691	1,868
Total costs and expenses	16,859	17,852
(Loss) income from operations	5,296	3,406
Other income (expense):
Interest expense	-378	-418
Foreign currency exchange		-1
(Loss) income before income tax (benefit) provision	4,918	2,987
Income tax (benefit) provision	960	755
Net (loss) income	$3,958	$2,232

Condensed_Consolidating_Statem1

Condensed Consolidating Statements of Comprehensive (Loss) Income (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Condensed Statement of Income Captions [Line Items]
Net (loss) income	($27,326)	$7,440
Foreign currency translation adjustment	-11,777	1,180
Comprehensive (loss) income	-39,103	8,620
Guarantors
Condensed Statement of Income Captions [Line Items]
Net (loss) income	-31,284	5,208
Comprehensive (loss) income	-31,284	5,208
Non-Guarantors
Condensed Statement of Income Captions [Line Items]
Net (loss) income	3,958	2,232
Foreign currency translation adjustment	-11,777	1,180
Comprehensive (loss) income	($7,819)	$3,412

Condensed_Consolidating_Statem2

Condensed Consolidating Statements of Cash Flows (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net income	($27,326,000)	$7,440,000
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment charge	64,726,000	283,000
Provision for doubtful accounts	1,169,000	547,000
Amortization of deferred financing costs	789,000	703,000
Amortization of long-term liabilities	25,000	41,000
Share-based compensation expense	3,250,000	4,164,000
Depreciation and amortization	15,539,000	9,145,000
Gain on sale of rental fleet units	-1,972,000	-1,711,000
Loss on disposal of property, plant and equipment	335,000	72,000
Deferred income taxes	-18,233,000	3,954,000
Foreign currency loss		1,000
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables	-636,000	778,000
Inventories	157,000	228,000
Deposits and prepaid expenses	446,000	-1,276,000
Other assets and intangibles	9,000	-5,000
Accounts payable	1,033,000	3,061,000
Accrued liabilities	-839,000	-613,000
Net cash provided by operating activities	38,472,000	26,812,000
Cash Flows from Investing Activities:
Cash paid for businesses, net of cash acquired	-1,200,000	-4,217,000
Additions to rental fleet	-10,480,000	-4,078,000
Proceeds from sale of rental fleet units	4,842,000	5,627,000
Additions to property, plant and equipment	-4,241,000	-2,628,000
Proceeds from sale of property, plant and equipment	607,000	908,000
Net cash used in investing activities	-10,472,000	-4,388,000
Cash Flows from Financing Activities:
Net borrowings (repayments) under lines of credit	-4,137,000	-16,307,000
Deferred financing costs	-100,000
Principal payments on capital lease obligations	-849,000	-367,000
Issuance of common stock	32,000	1,949,000
Dividend payments	-8,509,000	-7,849,000
Purchase of treasury stock	-15,284,000	-407,000
Net cash (used in) provided by financing activities	-28,847,000	-22,981,000
Effect of exchange rate changes on cash	156,000	-132,000
Net (decrease) increase in cash	-691,000	-689,000
Cash and cash equivalents at beginning of period	3,739,000	1,256,000
Cash and cash equivalents at end of period	3,048,000	567,000
Eliminations
Changes in certain assets and liabilities, net of effect of businesses acquired:
Intercompany	161,000
Net cash provided by operating activities	161,000
Cash Flows from Financing Activities:
Net borrowings (repayments) under lines of credit	-154,000
Principal payments on capital lease obligations	-7,000
Net cash (used in) provided by financing activities	-161,000
Guarantors
Cash Flows from Operating Activities:
Net income	-31,284,000	5,208,000
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment charge	64,726,000	136,000
Provision for doubtful accounts	947,000	453,000
Amortization of deferred financing costs	775,000	687,000
Amortization of long-term liabilities	25,000	40,000
Share-based compensation expense	3,160,000	3,963,000
Depreciation and amortization	13,848,000	7,277,000
Gain on sale of rental fleet units	-1,826,000	-1,500,000
Loss on disposal of property, plant and equipment	219,000	48,000
Deferred income taxes	-19,192,000	3,201,000
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables	188,000	1,404,000
Inventories	-75,000	285,000
Deposits and prepaid expenses	348,000	-1,416,000
Other assets and intangibles	9,000	-178,000
Accounts payable	751,000	1,123,000
Accrued liabilities	-467,000	-350,000
Intercompany	683,000	756,000
Net cash provided by operating activities	32,835,000	21,137,000
Cash Flows from Investing Activities:
Cash paid for businesses, net of cash acquired		-4,217,000
Additions to rental fleet	-5,745,000	-1,834,000
Proceeds from sale of rental fleet units	4,268,000	4,781,000
Additions to property, plant and equipment	-3,307,000	-2,393,000
Proceeds from sale of property, plant and equipment	243,000	708,000
Net cash used in investing activities	-4,541,000	-2,955,000
Cash Flows from Financing Activities:
Net borrowings (repayments) under lines of credit	-4,602,000	-10,773,000
Deferred financing costs	-100,000
Principal payments on capital lease obligations	-828,000	-367,000
Issuance of common stock	32,000	1,949,000
Dividend payments	-8,509,000	-7,849,000
Purchase of treasury stock	-15,284,000	-407,000
Net cash (used in) provided by financing activities	-29,291,000	-17,447,000
Net (decrease) increase in cash	-997,000	735,000
Cash and cash equivalents at beginning of period	2,977,000	-190,000
Cash and cash equivalents at end of period	1,980,000	545,000
Non-Guarantors
Cash Flows from Operating Activities:
Net income	3,958,000	2,232,000
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment charge		147,000
Provision for doubtful accounts	222,000	94,000
Amortization of deferred financing costs	14,000	16,000
Amortization of long-term liabilities		1,000
Share-based compensation expense	90,000	201,000
Depreciation and amortization	1,691,000	1,868,000
Gain on sale of rental fleet units	-146,000	-211,000
Loss on disposal of property, plant and equipment	116,000	24,000
Deferred income taxes	959,000	753,000
Foreign currency loss		1,000
Changes in certain assets and liabilities, net of effect of businesses acquired:
Receivables	-824,000	-626,000
Inventories	232,000	-57,000
Deposits and prepaid expenses	98,000	140,000
Other assets and intangibles		173,000
Accounts payable	282,000	1,938,000
Accrued liabilities	-372,000	-263,000
Intercompany	-844,000	-756,000
Net cash provided by operating activities	5,476,000	5,675,000
Cash Flows from Investing Activities:
Cash paid for businesses, net of cash acquired	-1,200,000
Additions to rental fleet	-4,735,000	-2,244,000
Proceeds from sale of rental fleet units	574,000	846,000
Additions to property, plant and equipment	-934,000	-235,000
Proceeds from sale of property, plant and equipment	364,000	200,000
Net cash used in investing activities	-5,931,000	-1,433,000
Cash Flows from Financing Activities:
Net borrowings (repayments) under lines of credit	619,000	-5,534,000
Principal payments on capital lease obligations	-14,000
Net cash (used in) provided by financing activities	605,000	-5,534,000
Effect of exchange rate changes on cash	156,000	-132,000
Net (decrease) increase in cash	306,000	-1,424,000
Cash and cash equivalents at beginning of period	762,000	1,446,000
Cash and cash equivalents at end of period	$1,068,000	$22,000