Long-Term Debt - Additional information (Detail) (USD $)	3 Months Ended
Apr. 04, 2015	Mar. 29, 2014
Debt Disclosure [Abstract]
Principal pre-payment amount	$ 10,000,000dco_RepaymentofTermLoan	$ 7,500,000dco_RepaymentofTermLoan
Remaining borrowing capacity	58,500,000
Outstanding standby letters of credit	1,500,000
Covenant trigger, letter of credit amount drawn maximum	1,000,000.0
Covenant trigger, letter of credit, aggregate amount outstanding, maximum	5,000,000.0
Fair value debt	$ 211,500,000us-gaap_LongTermDebtFairValue

Covenant Trigger, Letter Of Credit, Aggregate Amount Outstanding, Maximum

No definition available.

Name:	dco_CovenantTriggerLetterOfCreditAggregateAmountOutstandingMaximum
Namespace Prefix:	dco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Covenant Trigger, Letter of Credit, Amount Drawn, Maximum

+ References

No definition available.

+ Details

Name:	dco_CovenantTriggerLetterofCreditAmountDrawnMaximum
Namespace Prefix:	dco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Repayment of Term Loan

+ References

No definition available.

+ Details

Name:	dco_RepaymentofTermLoan
Namespace Prefix:	dco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant