Revolving Credit Facilities and Other Debt Obligations (Details) | Jun. 18, 2015USD ($) | May. 13, 2014USD ($) | Apr. 29, 2014USD ($) | Mar. 12, 2013USD ($) | Nov. 30, 2010USD ($)$ / sharesshares | Sep. 30, 2015USD ($)debt_obligationequipment | Sep. 30, 2015USD ($)debt_obligationequipment | Dec. 31, 2014USD ($)debt_obligationequipment | Jun. 30, 2015 | Sep. 30, 2014 | Aug. 31, 2014 | Feb. 21, 2014USD ($) | Jun. 30, 2013USD ($) | Nov. 24, 2010USD ($) |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year | | | | | | $ 173,062,000 | $ 173,062,000 | | | | | | | |
Line of Credit, Current | | | | | | 141,941,000 | 141,941,000 | $ 142,709,000 | | | | | | |
Revolving credit facility | | | | | | 2,049,000 | 2,049,000 | 1,781,000 | | | | | | |
Term loans | | | | | | 33,000,000 | 33,000,000 | 64,500,000 | | | | | | |
Term loans - short-term | | | | | | 32,349,000 | 32,349,000 | 2,000,000 | | | | | | |
Promissory notes | | | | | | 0 | 0 | 1,655,000 | | | | | | |
Purchase money security interest debt | | | | | | 7,451,000 | 7,451,000 | 6,652,000 | | | | | | |
Purchase money security interest debt - short-term | | | | | | 1,422,000 | 1,422,000 | 1,655,000 | | | | | | |
Total debt obligations outstanding | | | | | | 219,867,000 | 219,867,000 | 220,952,000 | | | | | | |
Notes Payable, Current | | | | | | 1,655,000 | 1,655,000 | 0 | | | | | | |
2,016 | | | | | | 5,133,000 | 5,133,000 | | | | | | | |
2,017 | | | | | | 36,344,000 | 36,344,000 | | | | | | | |
2,018 | | | | | | 1,714,000 | 1,714,000 | | | | | | | |
Long-term Debt, Maturities, Repayments of Principal in Year Five | | | | | | 2,819,000 | 2,819,000 | | | | | | | |
2019 and thereafter | | | | | | 795,000 | 795,000 | | | | | | | |
Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit, Current | | | | | | 119,947,000 | 119,947,000 | 118,611,000 | | | | | | |
Total debt obligations outstanding | | | | | | $ 150,300,000 | $ 150,300,000 | | | | | | | |
Debt, Weighted Average Interest Rate | | | | | | 7.00% | 7.00% | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | October 2,016 | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | $ 145,000,000 | | | | | | | | | | | | |
Maximum Amount Of Letters Of Credit Sublimit Under Credit Facility | | $ 20,000,000 | | | | | | | | | | | | |
Line Of Credit Facility Borrowing Base Percentage Of Eligible Accounts | | 85.00% | | | | | | | | | | | | |
Percentage Of Net Orderly Liquidation Value Eligible Asset | | 75.00% | | | | | | | | | | | | |
Line of Credit Facility, Future Reduction in Aggregate Commitment, Percentage of Proceeds on Sale of Assets | | 100.00% | | | | | | | | | | | | |
Line of Credit Facility, Future Reduction in Aggregate Commitment, Percentage of Free Cash Flow | | 60.00% | | | | | | | | | | | | |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | | 0.375% | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate, Default Rate | 3.75% | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | 1.1 | | | | | | | 1.10 | | 1.1 | | | |
Minimum Rental Equipment Sales Price as Percentage of Orderly Liquidation Value | | | | | | 70.00% | | | | | | | | |
Line of Credit Facility, Limit on Certain Capital Expenditures | | $ 2,000,000 | | | | | | | | | | | | |
Debt Instrument Covenant Maximum Indebtedness | | 1,500,000 | | | | | | | | | | | | |
Line of Credit Facility, Current Borrowing Capacity | | | | | | $ 121,400,000 | $ 121,400,000 | 135,300,000 | | | | | | |
Line of Credit Facility, Maximum Allowable Overadvance | | | | | | 32,300,000 | 32,300,000 | | | | | | | |
Line of Credit Facility, Maximum Allowable Overadvance Availability | | | | | | 1,200,000 | 1,200,000 | | | | | | | |
Line of Credit Facility, Remaining Borrowing Capacity | | | | | | | | 16,600,000 | | | | | | |
Line of Credit Facility, Remaining Borrowing Capacity After 10 Percent Availability Covenant Threshold | | | | | | | | 2,700,000 | | | | | | |
Line Of Credit Facility Excess Availability | | | | | | | | $ 1,500,000 | | | | | | |
Line of Credit Facility London Interbank Offer Rate (LIBOR) | | | | | | | | 0.16% | | | | | | |
Essex Crane Rental Equipment Orderly Liquidation Value Appraisal Reduction | $ 9,200,000 | | | | | | | | | | | | | |
Essex Crane Rental Equipment Orderly Liquidation Value Appraisal Percentage Reduction | 3.80% | | | | | | | | | | | | | |
Event of Default Interest Rate Increase | 2.00% | | | | | | | | | | | | | |
Essex Crane Term Loan | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Term loans | | $ 30,000,000 | | | | $ 30,349,000 | $ 30,349,000 | $ 30,000,000 | | | | | | |
Debt, Weighted Average Interest Rate | | | | | | 13.50% | 13.50% | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | May 2,019 | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate, Default Rate | 12.50% | | | | | | | | | | | | | |
Line of Credit Facility London Interbank Offer Rate (LIBOR) | | | | | | 0.20% | 0.20% | 0.16% | | | | | | |
London Interbank Offered Rate Interest Rate Floor | | 1.00% | | | | 1.00% | 1.00% | 1.00% | | | | | | |
Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit, Current | | | | | | $ 21,994,000 | $ 21,994,000 | $ 24,098,000 | | | | | | |
Debt, Weighted Average Interest Rate | | | | | | 5.35% | 5.35% | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | March 2,017 | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | | $ 35,000,000 | | | | | | | | | | |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | | | 0.50% | | | | 0.50% | 0.50% | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | | 1.2 | | | | | | | | | | |
Line of Credit Facility, Current Borrowing Capacity | | | | | | $ 35,000,000 | $ 35,000,000 | $ 35,000,000 | | | | | | |
Line of Credit Facility, Remaining Borrowing Capacity | | | | | | 1,600,000 | 1,600,000 | 3,300,000 | | | | | | |
London Interbank Offered Rate Interest Rate Floor | | | 1.50% | | | | | | | | | | | |
Reserves on Revolving Credit Facility | | | | $ 3,700,000 | | | | | | | | | | |
Line of Credit Facility, Letter of Credit Fee | | | 3.75% | | | | | | | | | | | |
Line Of Credit Facility Maximum Borrowing Capacity Reserve | | | | | | 9,400,000 | 9,400,000 | 5,800,000 | | | | | | |
Coast Crane Revolving Credit Facility, Coast LTD Portion | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Revolving credit facility | | | | | | $ 2,049,000 | $ 2,049,000 | 1,781,000 | | | | | | |
Debt, Weighted Average Interest Rate | | | | | | 5.27% | 5.27% | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | March 2,017 | | | | | | | |
Coast Crane Term Loan | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Term loans | | | | $ 40,000,000 | | $ 33,000,000 | $ 33,000,000 | 34,500,000 | | | | | | |
Term loans - short-term | | | | | | $ 2,000,000 | $ 2,000,000 | 2,000,000 | | | | | | |
Debt, Weighted Average Interest Rate | | | | | | 5.25% | 5.25% | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | within 1 year | | | | | | | |
Debt Instrument, Quarterly Principal Payment | | | | | | | | | | | | | $ 500,000 | |
Loans Payable to Bank | | | | | | $ 35,000,000 | $ 35,000,000 | 36,500,000 | | | | | | |
Unsecured Promissory Notes | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Promissory notes | | | | | $ 5,200,000 | $ 1,655,000 | $ 1,655,000 | 1,655,000 | | | | | | $ 5,200,000 |
Debt, Weighted Average Interest Rate | | | | | | 18.00% | 18.00% | | | | | | | |
Notes Payable, Current | | | | | | $ 1,655,000 | $ 1,655,000 | $ 1,655,000 | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | October 2,016 | | | | | | | |
Class of Warrant or Right Issued | shares | | | | | 90,000 | | | | | | | | | |
Common Stock Issuable Upon Exercise of Warrants | shares | | | | | 90,000 | | | | | | | | | |
Warrant Exercise Price per Share | $ / shares | | | | | $ 0.01 | | | | | | | | | |
Class of Warrant or Right Fair Value | | | | | $ 300,000 | | | | | | | | | |
Debt Instrument, Discount Amortization Period | | | | | | | 3 years | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | 18.00% | 18.00% | 18.00% | | | | | | |
Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Purchase money security interest debt | | | | | | $ 7,451,000 | $ 7,451,000 | $ 6,652,000 | | | | | | |
Purchase money security interest debt - short-term | | | | | | $ 1,422,000 | $ 1,422,000 | $ 1,655,000 | | | | | | |
Debt, Weighted Average Interest Rate | | | | | | 5.59% | 5.59% | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | within 1 year | | | | | | | |
Pieces of Equipment Financed | equipment | | | | | | 16 | 16 | 19 | | | | | | |
Long-term Debt | | | | | | $ 8,900,000 | $ 8,900,000 | $ 8,300,000 | | | | | | |
Minimum | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
US Eligible New Sale Inventory Cap | | | | | | | | | | | | $ 4,000,000 | | |
Minimum | Coast Crane Term Loan | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | December 2,016 | | | | | | | |
Minimum | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | October 2,016 | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | 3.59% | 3.59% | 3.59% | | | | | | |
Maximum | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
US Eligible New Sale Inventory Cap | | | | | | | | | | | | $ 15,000,000 | | |
Maximum | Coast Crane Term Loan | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | March 2,017 | | | | | | | |
Maximum | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Maturity Date, Description | | | | | | | April 2,022 | | | | | | | |
Prime Rate | Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | 1.75% | | | | | | | | | | | | |
Line of Credit Facility Prime Rate | | | | | | 3.25% | 3.25% | 3.25% | | | | | | |
Prime Rate | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | 2.75% | | | | | | | | | | | |
Line of Credit Facility Prime Rate | | | | | | 3.25% | 3.25% | 3.25% | | | | | | |
London Interbank Offered Rate (LIBOR) | Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | 3.75% | | | | | 0.375% | 0.375% | | | | | | |
London Interbank Offered Rate (LIBOR) | Essex Crane Term Loan | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | 10.50% | | | | | | | | | | | | |
London Interbank Offered Rate (LIBOR) | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | 3.75% | | | | | | | | | | |
Line of Credit Facility London Interbank Offer Rate (LIBOR) | | | | | | 0.3311% | 0.3311% | 0.25% | | | | | | |
London Interbank Offered Rate (LIBOR) | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Pieces of Equipment Financed | debt_obligation | | | | | | 5 | 5 | 10 | | | | | | |
London Interbank Offered Rate (LIBOR) | Minimum | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | 5.38% | 3.25% | | | | | | |
London Interbank Offered Rate (LIBOR) | Maximum | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | | | | | | | 5.38% | | | | | | |
Stated Interest Rate | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Pieces of Equipment Financed | debt_obligation | | | | | | 11 | 11 | | | | | | | |
Stated Interest Rate | Maximum | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | 8.29% | 8.29% | 8.29% | | | | | | |
Stated Interest Rate 8.29% | Purchase Money Security Interest Debt | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Pieces of Equipment Financed | debt_obligation | | | | | | | | 9 | | | | | | |
February 28 2016 | Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | $ 130,000,000 | | | | | | | | | | | | |
March 31 2016 | Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Rental Equipment Sales Proceeds | | 8,000,000 | | | | | | | | | | | | |
March 31 2015 | Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Rental Equipment Sales Proceeds | | $ 3,000,000 | | | | | | | | | | | | |
Option One | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line Of Credit Facility Borrowing Base Percentage Of Eligible Accounts | | | | 85.00% | | | | | | | | 85.00% | | |
Option One | Coast Crane Revolving Credit Facility, Coast LTD Portion | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line Of Credit Facility Borrowing Base Percentage Of Eligible Accounts | | | | | | | | | | | | 85.00% | | |
Option Two | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility Borrowing Base, Percentage of Inventory | | | | 50.00% | | | | | | | | 50.00% | | |
Line of Credit Facility Borrowing Base | | | | $ 5,000,000 | | | | | | | | $ 5,000,000 | | |
Option Two | Coast Crane Revolving Credit Facility, Coast LTD Portion | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility Borrowing Base, Percentage of Inventory | | | | | | | | | | | | 50.00% | | |
Line of Credit Facility Borrowing Base | | | | | | | | | | | | $ 800,000 | | |
Option Three | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility Borrowing Base | | | | $ 15,000,000 | | | | | | | | | | |
Line of Credit Facility Borrowing Base, Percentage of Net Orderly Liquidation Value and Invoice Cost of New Equipment | | | | 95.00% | | | | | | | | 95.00% | | |
Option Three | Coast Crane Revolving Credit Facility, Coast LTD Portion | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility Borrowing Base | | | | | | | | | | | | $ 2,000,000 | | |
Line of Credit Facility Borrowing Base, Percentage of Net Orderly Liquidation Value and Invoice Cost of New Equipment | | | | | | | | | | | | 95.00% | | |
Option Four | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility Borrowing Base, Percentage of Net Orderly Liquidation Value and Invoice Cost of New Equipment | | | | | | | | | | | | 85.00% | | |
Line of Credit Facility Borrowing Base, Percentage of Net Orderly Liquidation Value Less Reserves | | | | 85.00% | | | | | | | | | | |
Option Four | Coast Crane Revolving Credit Facility, Coast LTD Portion | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility Borrowing Base, Percentage of Net Orderly Liquidation Value and Invoice Cost of New Equipment | | | | | | | | | | | | 85.00% | | |
September 2014 | Essex Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | | | | | | | | 1.08 | | | | |
April 30 2014 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | 0.88 | | | | | | | | | | | |
May 31 2014 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | 1 | | | | | | | | | | | |
June 30 2014 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | 1.1 | | | | | | | | | | | |
July 31 2014 and Thereafter | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | 1.2 | | | | | | | | | | | |
March 31 2014 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Line of Credit Facility, Fixed Charge Coverage Ratio | | | 1 | | | | | | | | | | | |
March 2014 to August 2014 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Trailing Twelve Month EBITDA | | | $ 7,700,000 | | | | | | | | | | | |
September 2014 to November 2014 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Trailing Twelve Month EBITDA | | | 7,900,000 | | | | | | | | | | | |
December 2014 to February 2015 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Trailing Twelve Month EBITDA | | | 8,000,000 | | | | | | | | | | | |
March 2015 to May 2015 | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Trailing Twelve Month EBITDA | | | 8,200,000 | | | | | | | | | | | |
June 2015 and Thereafter | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Required Trailing Twelve Month EBITDA | | | $ 8,300,000 | | | | | | | | | | | |
2014 and Thereafter | Coast Crane Revolving Credit Facility | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt Instrument Covenant Maximum Indebtedness | | | | $ 10,000,000 | | | | | | | | | | |