Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical)

v2.4.1.9
CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]    
Allowance for accounts with partners $ 7.6us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 7.6us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Allowance for other receivable $ 2.4us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent $ 2.4us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent
Common stock, par value $ 0.10us-gaap_CommonStockParOrStatedValuePerShare $ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 65,823,346us-gaap_CommonStockSharesIssued 65,194,828us-gaap_CommonStockSharesIssued
Treasury stock, shares 7,508,699us-gaap_TreasuryStockShares 7,393,714us-gaap_TreasuryStockShares