Represents the additional period for which the approval was extended.

No definition available.

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- Definition

Represents the multiplier of period for which approval is extended.

+ References

No definition available.

+ Details

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Namespace Prefix:	mcri_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Total costs of sales and operating expenses for the period.

+ References

+ Details

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

- Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount, net of promotional allowances, of revenue from managing and operating hotels, including, but not limited to, revenue from occupancy, casino, food and beverage, and retail. Excludes operating lease income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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

- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended								12 Months Ended
	Aug. 23, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 22, 2014
Correction of Immaterial Error and Reclassifications:
Multiplier of period for which approval is extended	3mcri_ApprovalExtensionPeriodMultiplier
Additional period for which the approval was extended	6 months
Net Revenues		$ 45,859us-gaap_RevenueFromLeasedAndOwnedHotels	$ 48,597us-gaap_RevenueFromLeasedAndOwnedHotels	$ 47,803us-gaap_RevenueFromLeasedAndOwnedHotels	$ 45,508us-gaap_RevenueFromLeasedAndOwnedHotels	$ 44,504us-gaap_RevenueFromLeasedAndOwnedHotels	$ 48,989us-gaap_RevenueFromLeasedAndOwnedHotels	$ 49,651us-gaap_RevenueFromLeasedAndOwnedHotels	$ 45,605us-gaap_RevenueFromLeasedAndOwnedHotels	$ 187,767us-gaap_RevenueFromLeasedAndOwnedHotels	$ 188,749us-gaap_RevenueFromLeasedAndOwnedHotels	$ 163,302us-gaap_RevenueFromLeasedAndOwnedHotels
Operating Expenses		$ 41,105us-gaap_CostsAndExpenses	$ 41,931us-gaap_CostsAndExpenses	$ 42,335us-gaap_CostsAndExpenses	$ 40,177us-gaap_CostsAndExpenses	$ 40,341us-gaap_CostsAndExpenses	$ 40,050us-gaap_CostsAndExpenses	$ 39,483us-gaap_CostsAndExpenses	$ 38,420us-gaap_CostsAndExpenses	$ 165,548us-gaap_CostsAndExpenses	$ 158,294us-gaap_CostsAndExpenses	$ 147,319us-gaap_CostsAndExpenses
Maximum
Correction of Immaterial Error and Reclassifications:
Authorized repurchase of Company's common stock													3,000,000