Adjustment to deferred acquisition consideration included in interest expense

No definition available.

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- Definition

Clients exceeding consolidated accounts receivable percentage

+ References

No definition available.

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- Definition

Clients exceeding consolidated largest client revenue

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No definition available.

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- Definition

The percentage of accounts receivable that the largest client did not exceed during the period.

+ References

No definition available.

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- Definition

The percentage of revenue over the consolidated revenue that the largest client did not exceed during the period.

+ References

No definition available.

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Namespace Prefix:	mdca_
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- Definition

Deferred Tax Liability, Prior Period Correction

+ References

No definition available.

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Balance Type:	credit
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- Definition

Percentage of interest rate payable on senior notes.

+ References

No definition available.

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Namespace Prefix:	mdca_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Option to purchase noncontrolling interest impairment charge

+ References

No definition available.

+ Details

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- Definition

Adjustments to redeemable noncontrolling interest resulting from foreign currency translation adjustments.

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
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- References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Stock Issued During Period, Shares, Convertible Preferred Shares

+ References

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(11))
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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- 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.

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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-Paragraph 4
-Subparagraph (a)(1)
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- Definition

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 20
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=75027002&loc=d3e40346-111594

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- Definition

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

+ References

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Data Type:	num:percentItemType
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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (i)
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 3
-Subparagraph (a)(1)
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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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- Definition

Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

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-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The increase (decrease) in cash during the period due to the net increase or decrease in book overdrafts.

+ References

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

+ References

+ Details

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Balance Type:	credit
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

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Period Type:	instant

- Definition

Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 3A
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- Definition

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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- Definition

Amount of increase in noncontrolling interest from a business combination.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 1
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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Number of new stock issued during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 210
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-Section S99
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Significant Accounting Policies (Details Textual)							3 Months Ended			6 Months Ended		12 Months Ended
Significant Accounting Policies (Details Textual)	May 01, 2024	Apr. 01, 2017	May 03, 2016	Mar. 23, 2016	Oct. 23, 2014 USD ($)	Mar. 28, 2012	Jun. 30, 2017 USD ($) Clients shares	Mar. 31, 2017	Jun. 30, 2016 USD ($) Clients	Jun. 30, 2017 USD ($) Clients shares	Jun. 30, 2016 USD ($) Clients	Dec. 31, 2016 USD ($) Clients	Jan. 31, 2017 $ / shares shares	Dec. 31, 2015 USD ($)	Mar. 20, 2013
Significant Accounting Policies [Line Items]
Deferred Tax Liability, Prior Period Correction												$ 6,916
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability							$ 339			$ 677
Increase (Decrease) in Book Overdrafts											$ 28,300,000
Stock Issued During Period, Shares, Convertible Preferred Shares \| shares										90,220,000
Redeemable noncontrolling interests							62,955,000			$ 62,955,000		60,180,000
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests							11,947,000		$ 19,174,000	11,947,000	19,174,000
Noncontrolling Interest, Increase from Business Combination										(9,295,000)
Debt Issuance Costs, Net							$ (18,009,000)			$ (18,009,000)		$ (18,420,000)
Clients exceeding consolidated accounts receivable percentage \| Clients							0			0		0
Interest Rate Percentage On Senior Notes							6.75%			6.75%
Put option noncontrolling interest impairment charge							$ 0		$ 0	$ 0	$ 0
Cost Method Investments							$ 10,752,000			$ 10,752,000		$ 10,132,000
Consolidated Accounts Receivable Percentage								10.00%						10.00%
Clients exceeding consolidated largest client revenue \| Clients							0		0	0	0
Consolidated Largest Client Revenue							10.00%	10.00%	10.00%		10.00%
Business Combination, Acquisition Related Costs							$ 242,000		$ 907,000	$ 476,000	$ 1,460,000
Assets							1,650,254,000			1,650,254,000		1,577,378,000
Liabilities							1,986,337,000			1,986,337,000		2,026,674,000
Restricted stock grant date fair value										27,852,000
Adjustment to deferred acquisition consideration included in interest expense							25,000		40,000	54,000	152,000
Goodwill							851,135,000			851,135,000		844,759,000
Doner [Member]
Significant Accounting Policies [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		45.00%				30.00%
Assets							90,282,000			90,282,000		102,456,000
Liabilities							$ 50,420,000			50,420,000		57,622,000
Doner [Member]
Significant Accounting Policies [Line Items]
Ownership Interest Percentage Increase On Exercise Of Option		15.00%
Aggregate 2012 Acquisitions [Member] \| Doner [Member]
Significant Accounting Policies [Line Items]
Ownership Interest Percentage Increase On Exercise Of Option						70.00%
Aggregate 2017 Step Up Transactions [Domain]
Significant Accounting Policies [Line Items]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests										11,947
Noncontrolling Interest, Increase from Business Combination										$ 2,652
Aggregate 2017 Step Up Transactions [Domain] \| Doner [Member]
Significant Accounting Policies [Line Items]
Ownership Interest Percentage Increase On Exercise Of Option		85.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life										3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life										7 years
Equity Method Investment, Ownership Percentage							50.00%			50.00%
Real Estate Joint Venture [Member]
Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage							30.00%			30.00%
Wells Fargo Capital Finance, LLC
Significant Accounting Policies [Line Items]
Debt Instrument, Maturity Date			May 03, 2021		Sep. 30, 2019
Line of Credit Facility, Maximum Borrowing Capacity					$ 325,000,000
Contingent payment [Domain]
Significant Accounting Policies [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability							$ 4,306,000		$ (299,000)	$ 15,737,000	$ 6,028,000
Notes due 2020 [Member]
Significant Accounting Policies [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							6.75%			6.75%
Six Point Seven Five Percentage Notes [Member]
Significant Accounting Policies [Line Items]
Debt Instrument, Interest Rate, Stated Percentage															6.75%
Six Point Seven Five Percentage Notes [Member] \| Wells Fargo Capital Finance, LLC
Significant Accounting Policies [Line Items]
Debt Instrument, Maturity Date				Apr. 01, 2020
Notes due 2024 [Domain]
Significant Accounting Policies [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							6.50%			6.50%
Six Point Five Zero Percentage Notes [Domain]
Significant Accounting Policies [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				6.50%			6.50%			6.50%
Restricted Stock Units (RSUs) [Member] \| Common Class A
Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross \| shares										218,000
Restricted stock grant date fair value										$ 1,720,000
Scenario, Forecast [Member] \| Six Point Five Zero Percentage Notes [Domain]
Significant Accounting Policies [Line Items]
Debt Instrument, Maturity Date	May 01, 2024
Scenario, Forecast [Member] \| Six Point Five Zero Percentage Notes [Domain] \| Wells Fargo Capital Finance, LLC
Significant Accounting Policies [Line Items]
Debt Instrument, Maturity Date	May 01, 2024
Noncontrolling Interest Equity [Domain] \| Aggregate 2016 Step Up Transactions [Member]
Significant Accounting Policies [Line Items]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests												19,354
Redeemable Noncontrolling Interest [Member]
Significant Accounting Policies [Line Items]
Redeemable noncontrolling interests							$ 62,955,000			62,955,000		60,180,000		$ 69,471,000
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests										269,000		1,708,000
Noncontrolling Interest, Increase from Business Combination										0		2,274,000
Changes in redemption value										2,783,000		(9,604,000)
Redeemable Noncontrolling Interest Currency Adjustments										261,000		$ (253,000)
Stock Incentive Plan 2011 [Member] \| Stock Appreciation Rights (SARs) [Member]
Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized \| shares													327,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares													$ 6.60
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options							$ 770,000			$ 770,000
Stock Incentive Plan 2011 [Member] \| Contingent Restricted Stock Units (RSUs) [Member]
Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross \| shares										930,600
Stock Incentive Plan 2016 [Member] \| Contingent Restricted Stock Units (RSUs) [Member]
Significant Accounting Policies [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value \| shares							513,321			513,321