Covenant regarding excess availability falling below stated amount.

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- Definition

Represents the consolidated total leverage ratio commencing on June 30, 2017.

+ References

No definition available.

+ Details

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- Definition

Represents the consolidated total leverage ratio commencing on March 31, 2018

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Percentage of maximum credit amount during any period after default or event of default.

+ References

No definition available.

+ Details

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- Definition

Minimum percentage points of variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Represents information pertaining to revolving letter of credit trailing period.

+ References

No definition available.

+ Details

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- Definition

Represents the number of consecutive days, a financial covenant requiring the Company to maintain a minimum consolidated fixed charge coverage ratio

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Rate one at which loans or a loan portfolio are expected to prepay principal balance, used as an input to measure fair value.

+ References

No definition available.

+ Details

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- Definition

Rate three at which loans or a loan portfolio are expected to prepay principal balance, used as an input to measure fair value.

+ References

No definition available.

+ Details

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- Definition

Rate two at which loans or a loan portfolio are expected to prepay principal balance, used as an input to measure fair value.

+ References

No definition available.

+ Details

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- Definition

Letter of credit sublimit under the credit facility.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Represents the minimum consolidated fixed charge coverage ratio.

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No definition available.

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- Definition

The percentage of eligible accounts receivable included as part of the calculation of the borrowing base.

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No definition available.

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- Definition

The maximum percentage of consolidated adjusted EBITDA permitted to be added back to consolidated adjusted EBITDA for leverage ratio purposes.

+ References

No definition available.

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- Definition

The percentage of parts supplies included as part of the calculation of the borrowing base.

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No definition available.

+ Details

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The percentage of unbilled accounts receivable included as part of the calculation of the borrowing base.

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No definition available.

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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- Definition

The average effective interest rate during the reporting period.

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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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.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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LONG-TERM DEBT - ABL Facility (Details) - USD ($) $ in Millions			12 Months Ended
	Aug. 31, 2017	Feb. 27, 2017	Dec. 31, 2020	Dec. 31, 2019	Nov. 05, 2020	Nov. 04, 2020
LONG-TERM DEBT
Cash and cash equivalents			$ 176.2	$ 95.7
Outstanding letters of credit			$ 18.1	$ 15.9
Senior term loan
LONG-TERM DEBT
RLOC Utilization trailing period (in months)			12 months
Equipment and real estate term loans \| Maximum
LONG-TERM DEBT
Interest rate (as a percent)			5.90%
Equipment and real estate term loans \| Minimum
LONG-TERM DEBT
Interest rate (as a percent)			2.60%
Letter of credit
LONG-TERM DEBT
Line of credit sublimit					$ 40.0	$ 20.0
Term loan facility \| Credit Suisse AG
LONG-TERM DEBT
Percentage of EBITDA permitted to be added back (as a percent)			25.00%
Percentage of excess cash flow, mandatory prepayment, 2019			50.00%
Percentage of excess cash flow, mandatory prepayment, 2020			25.00%
Percentage of excess cash flow, mandatory prepayment, 2021			0.00%
Term loan facility \| Credit Suisse AG \| Commencing March 31 2018
LONG-TERM DEBT
Consolidated total leverage ratio commencing on March 31, 2018			4.00%
Term loan facility \| Credit Suisse AG \| Commencing March 31 2021
LONG-TERM DEBT
Consolidated total leverage ratio commencing on March 31, 2021			3.75%
Term loan facility \| Credit Suisse AG \| Base Rate
LONG-TERM DEBT
Floor rate (as a percent)		2.00%
Basis spread on variable rate		4.00%
Term loan facility \| Credit Suisse AG \| LIBOR
LONG-TERM DEBT
Floor rate (as a percent)		1.00%
Basis spread on variable rate		5.00%
Term loan facility \| Senior Debt \| Credit Suisse AG
LONG-TERM DEBT
Credit facility		$ 500.0
Average interest rate on term loan			6.30%	7.40%
ABL Member
LONG-TERM DEBT
Excess availability falling below amount	$ 15.0
Maximum credit amount (as a percent)	20.00%
Number of consecutive days, a financial covenant requiring the Company to maintain a minimum consolidated fixed charge coverage ratio	60 days
Minimum consolidated fixed charge coverage ratio	1.00%
ABL Member \| Credit Suisse AG \| Commencing March 31 2018
LONG-TERM DEBT
Consolidated total leverage ratio commencing on March 31, 2018			4.00%
ABL Member \| Credit Suisse AG \| Commencing March 31 2021
LONG-TERM DEBT
Consolidated total leverage ratio commencing on March 31, 2021			3.75%
ABL Member \| PNC Bank National Association
LONG-TERM DEBT
Credit facility					$ 150.0	$ 100.0
Percentage of accounts receivable used as part of the borrowing base calculation			85.00%
Percentage of unbilled accounts receivable used as part of the borrowing base calculation			80.00%
Percentage of parts supplies used as part of the borrowing base calculation			50.00%
Line of credit sublimit			$ 40.0
Outstanding letters of credit			0.0
Availability at closing			$ 83.2
Interest rate (as a percent)			3.75%
ABL Member \| PNC Bank National Association \| Maximum
LONG-TERM DEBT
Credit facility			$ 150.0
ABL Member \| PNC Bank National Association \| Minimum
LONG-TERM DEBT
Credit facility			$ 100.0
ABL Member \| PNC Bank National Association \| Base Rate \| Less than 33.3%
LONG-TERM DEBT
Basis spread on variable rate			0.50%
ABL Member \| PNC Bank National Association \| Base Rate \| Greater than or equal to 33.3%, but less than 66.6%
LONG-TERM DEBT
Basis spread on variable rate			0.75%
ABL Member \| PNC Bank National Association \| Base Rate \| Greater than or equal to 66.6%
LONG-TERM DEBT
Basis spread on variable rate			1.00%
ABL Member \| PNC Bank National Association \| LIBOR \| Less than 33.3%
LONG-TERM DEBT
Basis spread on variable rate			1.50%
ABL Member \| PNC Bank National Association \| LIBOR \| Greater than or equal to 33.3%, but less than 66.6%
LONG-TERM DEBT
Basis spread on variable rate			1.75%
ABL Member \| PNC Bank National Association \| LIBOR \| Greater than or equal to 66.6%
LONG-TERM DEBT
Basis spread on variable rate			2.00%
ABL Member \| Letter of credit \| PNC Bank National Association
LONG-TERM DEBT
Outstanding letters of credit			$ 16.2