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Amount and Expiration Dates of Operating Loss and Tax Credit Carryforwards (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss and tax credit carry forwards 196,195ck0000034115_OperatingLossAndTaxCreditCarryforwards
U.S. federal  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, amount 127,419us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
U.S. federal | Minimum  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, expiration date 2029
U.S. federal | Maximum  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, expiration date 2035
Non-U.S.  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, amount 14,981us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
Tax credits carryforwards, amount 29,933us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
Operating loss carryforwards, expiration date Indefinite
Tax credits carryforwards, expiration date beginning 2020
Tax credits carryforwards, expiration date ending 2025
Non-U.S. | Net Operating Loss Carryforwards with Indefinite Carryforward Period  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, amount 10,245us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember
/ ck0000034115_OperatingLossCarryforwardExpirationPeriodAxis
= ck0000034115_NetOperatingLossCarryforwardsWithIndefiniteCarryforwardPeriodMember
Non-U.S. | Minimum  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, expiration date 2016
Non-U.S. | Maximum  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, expiration date 2032
State  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, amount 13,617us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
State | Minimum  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, expiration date 2015
State | Maximum  
Deferred Tax Assets, Net Operating Losses, Capital Losses, and Tax Credits Carryforwards [Line Items]  
Operating loss carryforwards, expiration date 2035