Debt (Details) £ in Millions, CAD in Millions		1 Months Ended			3 Months Ended		9 Months Ended		10 Months Ended	12 Months Ended
	Aug. 25, 2017 USD ($)	Feb. 28, 2017 USD ($)	Jan. 31, 2017 USD ($)	Feb. 29, 2016 USD ($)	Jul. 30, 2017 GBP (£)	Jul. 31, 2016	Jul. 30, 2017 GBP (£)	Jul. 31, 2016	Aug. 24, 2017	Oct. 30, 2016 USD ($)	Jul. 30, 2017 CAD	Jul. 30, 2017 USD ($)	Jul. 14, 2017	Mar. 31, 2017 USD ($)
Debt Instrument [Line Items]
Less: current portion										$ 2,050,000		$ 100,000,000
Total long-term debt										$ 95,000,000		0
Line of Credit
Debt Instrument [Line Items]
Line of credit facility borrowing capacity			$ 160,000,000.0		£ 20.0		£ 20.0				CAD 30.0
Unbilled receivable percent			10.00%							15.00%
Maximum quarterly distribution if liquidity requirement is met			$ 500,000.0
Covenant terms, EBIT minimum to pay dividends			40,000,000
Cash collateral of outstanding short-term borrowings		$ 20,000,000.0												$ 25,000,000.0
Fair value of amount outstanding												142,700,000
Maximum borrowing capacity												250,000,000.0
Outstanding borrowing										$ 95,000,000		100,000,000
Weighted average interest rate during period					3.10%	2.40%	2.90%	2.30%
Available borrowing capacity of facility												14,400,000
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility borrowing capacity												50,000,000
Fair value of amount outstanding												28,300,000
Casualty Insurance Program
Debt Instrument [Line Items]
Fair value of amount outstanding												26,900,000
Security Deposit
Debt Instrument [Line Items]
Fair value of amount outstanding												1,400,000
Maintech, Incorporated | Letter of Credit
Debt Instrument [Line Items]
Line of credit facility borrowing capacity				$ 100,000
Portion secured by parent				3,000,000.0
Maintech, Incorporated | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility borrowing capacity				10,000,000
Fair value of amount outstanding										2,100,000
Outstanding borrowing				$ 2,000,000
Available borrowing capacity of facility										3,300,000
Term				364 days
Commitment fee percentage				0.375%
Term of extension		1 month
Maintech, Incorporated | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate				2.75%
Sale of Maintech or Receipt of IRS Refund | Line of Credit
Debt Instrument [Line Items]
Minimum global liquidity covenant			25,000,000.0
Dividend Payment or Stock Repurchase | Line of Credit
Debt Instrument [Line Items]
Minimum global liquidity covenant			35,000,000.0
Maximum | Line of Credit
Debt Instrument [Line Items]
Supply chain finance receivable			$ 5,000,000
Short Term Financing Program
Debt Instrument [Line Items]
Financing programs										$ 97,050,000		$ 100,000,000
July 2017 through September 2017 | Line of Credit
Debt Instrument [Line Items]
Delinquent receivables threshold													0.025
Prior to July 2017 | Line of Credit
Debt Instrument [Line Items]
Delinquent receivables threshold													0.02
In and After October 2017 | Line of Credit
Debt Instrument [Line Items]
Delinquent receivables threshold													0.02
Subsequent Event | Line of Credit
Debt Instrument [Line Items]
Minimum global liquidity covenant	$ 5,000,000
Line of credit facility, minimum borrowing block	10,000,000
Increase in borrowing availability	$ 10,000,000
Program and LC fees, percentage	1.80%								1.20%