1.0.0.3 false CONSOLIDATED BALANCE SHEETS (USD $) In Thousands false 1 $ false false shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 4 Current Assets: 2 us-gaap_AssetsCurrentAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 5 Cash and cash equivalents 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 true true 289469000 289469 false false 2 true true 221334000 221334 false false No definition available. No authoritative reference available. false 6 Accounts receivable 3 us-gaap_AccountsReceivableNetCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 285119000 285119 false false 2 false true 228951000 228951 false false No definition available. No authoritative reference available. false 7 Unbilled services 3 cvd_UnbilledServices cvd false debit instant monetary Amount due from customers or clients, within one year of the balance sheet date, that is currently unbillable pursuant to... false false false false false false false false false 1 false true 97279000 97279 false false 2 false true 112719000 112719 false false Amount due from customers or clients, within one year of the balance sheet date, that is currently unbillable pursuant to contractual terms, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. No authoritative reference available. false 8 Inventory 3 us-gaap_InventoryNet us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 80926000 80926 false false 2 false true 68206000 68206 false false No definition available. No authoritative reference available. false 9 Deferred income taxes 3 us-gaap_DeferredTaxAssetsNetCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 31512000 31512 false false 2 false true 15029000 15029 false false No definition available. No authoritative reference available. false 10 Prepaid expenses and other current assets 3 cvd_PrepaidExpensesAndOtherCurrentAssets cvd false debit instant monetary Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of... false false false false false false false false false 1 false true 93367000 93367 false false 2 false true 91451000 91451 false false Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer and aggregate carrying amount, as of the balance sheet date, of current assets not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). No authoritative reference available. false 11 Total Current Assets 3 us-gaap_AssetsCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 877672000 877672 false false 2 false true 737690000 737690 false false No definition available. No authoritative reference available. true 12 Property and equipment, net 2 us-gaap_PropertyPlantAndEquipmentNet us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 921995000 921995 false false 2 false true 860957000 860957 false false No definition available. No authoritative reference available. false 13 Goodwill, net 2 us-gaap_Goodwill us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 127653000 127653 false false 2 false true 105486000 105486 false false No definition available. No authoritative reference available. false 14 Other assets 2 us-gaap_OtherAssetsNoncurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 47624000 47624 false false 2 false true 48955000 48955 false false No definition available. No authoritative reference available. false 15 Total Assets 2 us-gaap_Assets us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 1974944000 1974944 false false 2 false true 1753088000 1753088 false false No definition available. No authoritative reference available. true 17 Current Liabilities: 2 us-gaap_LiabilitiesCurrentAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 18 Accounts payable 3 us-gaap_AccountsPayableCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 36834000 36834 false false 2 false true 41887000 41887 false false No definition available. No authoritative reference available. false 19 Accrued payroll and benefits 3 us-gaap_EmployeeRelatedLiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 111365000 111365 false false 2 false true 104607000 104607 false false No definition available. No authoritative reference available. false 20 Accrued expenses and other current liabilities 3 cvd_AccruedExpensesAndOtherCurrentLiabilities cvd false credit instant monetary Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in... false false false false false false false false false 1 false true 73383000 73383 false false 2 false true 86521000 86521 false false Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer) and aggregate carrying amount, as of the balance sheet date, of current obligations not separately disclosed in the balance sheet due to materiality considerations. Current liabilities are expected to be paid within one year (or the normal operating cycle, if longer). No authoritative reference available. false 21 Unearned revenue 3 cvd_UnearnedRevenue cvd false credit instant monetary Amount received from customers or clients for goods or services to be provided within one year of the balance sheet date, in... false false false false false false false false false 1 false true 166890000 166890 false false 2 false true 162556000 162556 false false Amount received from customers or clients for goods or services to be provided within one year of the balance sheet date, in the normal course of business. No authoritative reference available. false 22 Short-term debt 3 us-gaap_ShortTermBankLoansAndNotesPayable us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 50000000 50000 false false No definition available. No authoritative reference available. false 23 Income taxes payable 3 us-gaap_AccruedIncomeTaxesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 14272000 14272 false false 2 false true 14224000 14224 false false No definition available. No authoritative reference available. false 24 Total Current Liabilities 3 us-gaap_LiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 402744000 402744 false false 2 false true 459795000 459795 false false No definition available. No authoritative reference available. true 25 Deferred income taxes 2 us-gaap_DeferredTaxLiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 98945000 98945 false false 2 false true 51385000 51385 false false No definition available. No authoritative reference available. false 26 Other liabilities 2 us-gaap_OtherLiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 62251000 62251 false false 2 false true 47059000 47059 false false No definition available. No authoritative reference available. false 27 Total Liabilities 2 us-gaap_Liabilities us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 563940000 563940 false false 2 false true 558239000 558239 false false No definition available. No authoritative reference available. true 29 Stockholders' Equity: 2 us-gaap_StockholdersEquityAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 30 Preferred stock-Par value $1.00 per share; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2009 and 2008 3 us-gaap_PreferredStockValue us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 0 0 false false No definition available. No authoritative reference available. false 31 Common stock-Par value $0.01 per share; 140,000,000 shares authorized; 76,362,691 and 75,447,578 shares issued and outstanding, including those held in treasury, at December 31, 2009 and 2008, respectively 3 us-gaap_CommonStockValue us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 764000 764 false false 2 false true 754000 754 false false No definition available. No authoritative reference available. false 32 Paid-in capital 3 us-gaap_AdditionalPaidInCapitalCommonStock us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 587995000 587995 false false 2 false true 551598000 551598 false false No definition available. No authoritative reference available. false 33 Retained earnings 3 us-gaap_RetainedEarningsAccumulatedDeficit us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1305451000 1305451 false false 2 false true 1129569000 1129569 false false No definition available. No authoritative reference available. false 34 Accumulated other comprehensive loss 3 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true -5281000 -5281 false false 2 false true -13975000 -13975 false false No definition available. No authoritative reference available. false 35 Treasury stock at cost (12,257,065 and 12,150,495 shares at December 31, 2009 and 2008, respectively) 3 us-gaap_TreasuryStockValue us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true -477925000 -477925 false false 2 false true -473097000 -473097 false false No definition available. No authoritative reference available. false 36 Total Stockholders' Equity 3 us-gaap_StockholdersEquity us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1411004000 1411004 false false 2 false true 1194849000 1194849 false false No definition available. No authoritative reference available. true 37 Total Liabilities and Stockholders' Equity 2 us-gaap_LiabilitiesAndStockholdersEquity us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 true true 1974944000 1974944 false false 2 true true 1753088000 1753088 false false No definition available. No authoritative reference available. true false 2 32 false Thousands UnKnown UnKnown false true