2.2.0.7 false Consolidated Balance Sheets (Parenthetical) (USD $) 0111 - Statement - Consolidated Balance Sheets (Parenthetical) true false In Thousands, except Share data false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 4 Current assets: 2 us-gaap_AssetsCurrentAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 5 Allowance for doubtful accounts 3 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 9903000 9903 false false false 2 true true false false 10809000 10809 false false false xbrli:monetaryItemType monetary A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 false 6 Short term investment at fair value 3 life_ShortTermInvestmentAtFairValue life false debit instant Short term investment at fair value. false false false false false false false false false false false verboselabel false 1 false true false false 29000000 29000 false false false 2 false true false false 0 0 false false false xbrli:monetaryItemType monetary Short term investment at fair value. No authoritative reference available. false 7 Long term investments at fair value 1 us-gaap_InvestmentOwnedAtFairValue us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 0 0 false false false 2 true true false false 34800000 34800 false false false xbrli:monetaryItemType monetary Value of the investment at close of period. For schedules of investments that are categorized, the value should be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph 2, 3 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Paragraph Column C -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph 3, 4 -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Paragraph 7 -Article 12 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph Column E -Article 12 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 13 -Paragraph 6 -Article 12 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph Column C -Article 12 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 13 -Paragraph Column C -Article 12 false 8 Stockholders' equity: 1 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 9 Preferred stock, par value 2 us-gaap_PreferredStockParOrStatedValuePerShare us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel true 1 true true false false 0.01 0.01 false false false 2 true true false false 0.01 0.01 false false false us-types:perShareItemType decimal Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 false 10 Preferred stock, shares authorised 2 us-gaap_PreferredStockSharesAuthorized us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 6405884 6405884 false false false 2 false true false false 6405884 6405884 false false false xbrli:sharesItemType shares The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 false 11 Preferred stock, shares issued 2 us-gaap_PreferredStockSharesIssued us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 false false false 2 false true false false 0 0 false false false xbrli:sharesItemType shares Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 false 12 Preferred stock, shares outstanding 2 us-gaap_PreferredStockSharesOutstanding us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 false false false 2 false true false false 0 0 false false false xbrli:sharesItemType shares Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 false 13 Common stock, par value 2 us-gaap_CommonStockParOrStatedValuePerShare us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel true 1 true true false false 0.01 0.01 false false false 2 true true false false 0.01 0.01 false false false us-types:perShareItemType decimal Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false 14 Common stock, shares authorized 2 us-gaap_CommonStockSharesAuthorized us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 400000000 400000000 false false false 2 false true false false 400000000 400000000 false false false xbrli:sharesItemType shares The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false 15 Common stock, shares issued 2 us-gaap_CommonStockSharesIssued us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 199505140 199505140 false false false 2 false true false false 196297725 196297725 false false false xbrli:sharesItemType shares Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false 16 Treasury stock, shares 2 us-gaap_TreasuryStockShares us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 16544297 16544297 false false false 2 false true false false 16214572 16214572 false false false xbrli:sharesItemType shares Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false 2 13 false Thousands NoRounding NoRounding false true