Credit Agreement Expiration Trigger Requirement, Convertible Note Outstanding Balance

No definition available.

Name:	cnmd_CreditAgreementExpirationTriggerRequirementConvertibleNoteOutstandingBalance
Namespace Prefix:	cnmd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Convertible, Initial Conversion Rate

+ References

No definition available.

+ Details

Name:	cnmd_DebtInstrumentConvertibleInitialConversionRate
Namespace Prefix:	cnmd_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Up-front costs to purchase hedge instruments, net of cash received from sale of warrants

+ References

No definition available.

+ Details

Name:	cnmd_Hedgeandwarranttransactionsnetcashpaid
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Balance Type:	debit
Period Type:	duration

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
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Balance Type:	debit
Period Type:	duration

- 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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Balance Type:	na
Period Type:	duration

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031898-161870

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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+ Details

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

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
Period Type:	instant

- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Exercise or strike price stated in the contract for options indexed to the issuer's equity shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 5
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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Subsequent Events (Details) - USD ($)				3 Months Ended						12 Months Ended
Subsequent Events (Details) - USD ($)	Feb. 11, 2019	Feb. 07, 2019	Jan. 29, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 04, 2016
Buffalo Filter LLC [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Payments to acquire business	$ 365,000,000
Amended and Restated Senior Credit Agreement [Member] \| Term Loan Facility [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount													$ 175,000,000.0
Amended and Restated Senior Credit Agreement [Member] \| Term Loan Facility [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount		$ 265,000,000
Amended and Restated Senior Credit Agreement [Member] \| Revolving Line of Credit [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity													$ 525,000,000.0
Amended and Restated Senior Credit Agreement [Member] \| Revolving Line of Credit [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		585,000,000
2.625 Percent Convertible Notes Due 2024 [Member] \| Convertible Notes Payable [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount			$ 345,000,000
Debt interest rate (percent)			2.625%
Credit Agreement Expiration Trigger Requirement, Convertible Note Outstanding Balance		$ 150,000,000
Debt Instrument, Convertible, Initial Conversion Rate			11.2608
Debt Instrument, Convertible, Conversion Price			$ 88.80
London Interbank Offered Rate (LIBOR) [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Long-term Debt [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread on variable rate (percent)		1.875%
Federal Funds Effective Swap Rate [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Long-term Debt [Member]
Subsequent Event [Line Items]
Basis spread on variable rate (percent)										0.50%
Federal Funds Effective Swap Rate [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Long-term Debt [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread on variable rate (percent)		0.50%
Eurodollar [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Long-term Debt [Member]
Subsequent Event [Line Items]
Basis spread on variable rate (percent)										1.00%
Eurodollar [Member] \| Amended and Restated Senior Credit Agreement [Member] \| Long-term Debt [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread on variable rate (percent)		1.00%
Call Option [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Hedge and warrant transactions, net cash paid			$ 21,000,000
Option Indexed to Issuer's Equity, Strike Price			$ 114.92
Selling and Administrative Expenses [Member]
Subsequent Event [Line Items]
Business and asset acquisition costs				$ 1,300,000	$ 1,100,000	$ 1,300,000	$ 100,000	$ 400,000	$ 500,000	$ 2,372,000	$ 2,336,000	$ 17,029,000
Selling and Administrative Expenses [Member] \| Buffalo Filter LLC [Member]
Subsequent Event [Line Items]
Business and asset acquisition costs										$ 1,300,000