XML 52 R39.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Implemented Accounting Pronouncements - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | $ 401,681 | $ 367,485 | $ 347,247
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 96,649 | 94,549 | 76,833
Total revenues |  | $ 133,115 | $ 143,147 | $ 116,983 | $ 105,085 | $ 122,227 | $ 135,388 | $ 109,582 | $ 94,837 | 498,330 | 462,034 | 424,080
Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 365,212 | 331,218 | 315,089
Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 41,753 | 40,011 | 36,910
Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 89,452 | 89,302 | 70,503
Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,913 | 1,503 | 1,578
Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 133,118 | 130,816 | 108,991
Mobile Modular [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 40,742 | 38,234 | 29,810
Total revenues |  |  |  |  |  |  |  |  |  | 254,574 | 231,266 | 209,512
Mobile Modular [Member] | Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 200,214 | 180,612 | 168,787
Mobile Modular [Member] | Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 14,870 | 13,331 | 11,326
Mobile Modular [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 39,467 | 37,434 | 29,393
Mobile Modular [Member] | Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 23 | (111) | 6
Mobile Modular [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 54,360 | 50,654 | 40,725
TRS-RenTelco [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 25,420 | 22,374 | 23,464
Total revenues |  |  |  |  |  |  |  |  |  | 118,657 | 108,044 | 108,617
TRS-RenTelco [Member] | Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 94,345 | 85,930 | 87,085
TRS-RenTelco [Member] | Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 2,607 | 2,358 | 2,292
TRS-RenTelco [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 19,895 | 18,137 | 17,675
TRS-RenTelco [Member] | Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,810 | 1,619 | 1,565
TRS-RenTelco [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 24,312 | 22,114 | 21,532
Adler Tanks [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,441 | 2,572 | 1,438
Total revenues |  |  |  |  |  |  |  |  |  | 96,053 | 91,355 | 83,830
Adler Tanks [Member] | Leasing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing revenues |  |  |  |  |  |  |  |  |  | 70,653 | 64,676 | 59,217
Adler Tanks [Member] | Non-lease Rental Related Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 24,276 | 24,322 | 23,292
Adler Tanks [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 1,044 | 2,362 | 1,314
Adler Tanks [Member] | Non-lease Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 80 | (5) | 7
Adler Tanks [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 25,400 | 26,679 | 24,613
Enviroplex [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues | [1] |  |  |  |  |  |  |  |  | 29,046 | 31,369 | 22,121
Total revenues | [1] |  |  |  |  |  |  |  |  | 29,046 | 31,369 | 22,121
Enviroplex [Member] | Non-lease Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | 29,046 | 31,369 | 22,121
Enviroplex [Member] | Non-lease Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total non-lease revenues |  |  |  |  |  |  |  |  |  | $ 29,046 | $ 31,369 | $ 22,121
[1] | Gross Enviroplex sales revenues were $30,407, $31,369 and $22,206 in 2018, 2017 and 2016, respectively. There were $1,361 and $85 inter-segment sales to Mobile Modular in 2018 and 2016, respectively, which have been eliminated in consolidation. There were no inter-segment sales in 2017.

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
Name: | us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=mgrc_LeasingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mgrc_NonLeaseRentalRelatedServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mgrc_NonLeaseSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mgrc_NonLeaseOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mgrc_NonLeaseRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mgrc_MobileModularMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mgrc_TrsRenTelcoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mgrc_AdlerTanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mgrc_EnviroplexMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |