STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS, Plan Information (Details) (USD $)
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3 Months Ended | 12 Months Ended | |||||||||||||
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2011
Deferred Compensation Arrangement [Member]
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Dec. 31, 2010
Deferred Compensation Arrangement [Member]
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Dec. 31, 2009
Deferred Compensation Arrangement [Member]
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Dec. 31, 2011
2001 Plan [Member]
Stock Options [Member]
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Dec. 31, 2005
2005 Plan [Member]
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Dec. 31, 2011
2005 Plan [Member]
Stock Options [Member]
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Dec. 31, 2011
2005 Plan [Member]
RSUs [Member]
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Dec. 31, 2011
2005 Plan [Member]
PSUs [Member]
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STOCKHOLDERS' EQUITY AND EQUITY INSTRUMENTS [Abstract] | |||||||||||||||
Dividends paid (in dollars per share) | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 1.80 | $ 1.56 | $ 1.42 | ||||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||
Deferred stock units credited in period (in shares) | 10,460 | 9,317 | 11,744 | ||||||||||||
Shares reissued from Treasury Stock (in shares) | 12,143 | 853 | 10,135 | ||||||||||||
Authorized shares of CMP common stock (in shares) | 3,240,000 | ||||||||||||||
Vesting period, minimum (in years) | 3Y | ||||||||||||||
Vesting period, maximum (in years) | 4Y | ||||||||||||||
Service period (in years) | 4Y | 3Y | 3Y | ||||||||||||
Award expiration description | Rights will expire upon the tenth anniversary of the date of the Rights Agreement | expire on the thirtieth day immediately following the eighth anniversary of issuance. | The right to grant awards expires in 2015 | Unexercised options expire after seven years | |||||||||||
Number of tranches | 3 | ||||||||||||||
Terms of award | Upon vesting, each option can be exercised to purchase one share of the Company's common stock. | one share of common stock for each vested RSU | |||||||||||||
Performance period of each tranche (in years) | 1Y | ||||||||||||||
Minimum percentage of earnings (in hundredths) | 0.00% | ||||||||||||||
Maximum percentage of earnings (in hundredths) | 150.00% |