Contract with Customer, Asset, Period Increase (Decrease)

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Contract with Customer, Liability, Period Increase (Decrease)

+ References

No definition available.

+ Details

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Namespace Prefix:	cir_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
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-Publisher FASB
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 45
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+ Details

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

- Definition

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.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Paragraph 28
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Balance Type:
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- Details

Name:	srt_ProductOrServiceAxis=cir_CommercialAerospaceandOtherMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Trade accounts receivable, less allowance for doubtful accounts of $9,017 and $3,086 at March 29, 2020 and December 31, 2019, respectively	$ 116,514		$ 125,422
Revenue by major product line	192,213	$ 238,855
Contract with Customer, Asset, after Allowance for Credit Loss	63,826			$ 52,781
Contract with Customer, Liability	39,850		$ 35,007
Contract with Customer, Liability, Period Increase (Decrease)	4,800
Aerospace & Defense Segment
Disaggregation of Revenue [Line Items]
Revenue by major product line	65,493	61,240
Aerospace & Defense Segment \| EMEA
Disaggregation of Revenue [Line Items]
Revenue by major product line	14,806	17,732
Aerospace & Defense Segment \| North America
Disaggregation of Revenue [Line Items]
Revenue by major product line	45,988	37,393
Aerospace & Defense Segment \| Total
Disaggregation of Revenue [Line Items]
Revenue by major product line	4,699	6,115
Aerospace & Defense Segment \| Commercial Aerospace & Other
Disaggregation of Revenue [Line Items]
Revenue by major product line	26,320	28,706
Aerospace & Defense Segment \| Defense
Disaggregation of Revenue [Line Items]
Revenue by major product line	39,173	32,534
Industrial Segment
Disaggregation of Revenue [Line Items]
Revenue by major product line	126,720	177,615
Industrial Segment \| EMEA
Disaggregation of Revenue [Line Items]
Revenue by major product line	57,006	75,743
Industrial Segment \| North America
Disaggregation of Revenue [Line Items]
Revenue by major product line	43,922	73,847
Industrial Segment \| Total
Disaggregation of Revenue [Line Items]
Revenue by major product line	25,792	28,025
Industrial Segment \| Valves
Disaggregation of Revenue [Line Items]
Revenue by major product line	54,190	92,303
Industrial Segment \| Pumps
Disaggregation of Revenue [Line Items]
Revenue by major product line	72,530	$ 85,312
Accounting Standards Update 2014-09 [Member]
Disaggregation of Revenue [Line Items]
Trade accounts receivable, less allowance for doubtful accounts of $9,017 and $3,086 at March 29, 2020 and December 31, 2019, respectively	116,514
Increase (Decrease) in Accounts and Other Receivables	(8,908)
Contract with Customer, Asset, after Allowance for Credit Loss	63,800
ContractwithCustomerAssetPeriodIncreaseDecrease	11,045
Contract with Customer, Liability, Period Increase (Decrease)	$ 4,843