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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Current assets: |  |  |  |
Cash and cash equivalents | $ 294,256 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | $ 341,638 us-gaap_CashAndCashEquivalentsAtCarryingValue |
Marketable securities | 533,787 us-gaap_AvailableForSaleSecuritiesCurrent |  | 586,882 us-gaap_AvailableForSaleSecuritiesCurrent |
Accounts receivable, less allowance for doubtful accounts of $2,491 and $2,912 in 2014 and 2013, respectively | 151,034 us-gaap_AccountsReceivableNetCurrent |  | 157,642 us-gaap_AccountsReceivableNetCurrent |
Inventories: |  |  |  |
Parts | 70,821 us-gaap_InventoryRawMaterialsNetOfReserves |  | 84,232 us-gaap_InventoryRawMaterialsNetOfReserves |
Assemblies in process | 10,347 us-gaap_InventoryWorkInProcessNetOfReserves |  | 15,539 us-gaap_InventoryWorkInProcessNetOfReserves |
Finished goods | 23,961 us-gaap_InventoryFinishedGoodsNetOfReserves |  | 38,168 us-gaap_InventoryFinishedGoodsNetOfReserves |
Inventory, Net, Total | 105,129 us-gaap_InventoryNet |  | 137,939 us-gaap_InventoryNet |
Deferred tax assets | 57,239 us-gaap_DeferredTaxAssetsNetCurrent |  | 72,478 us-gaap_DeferredTaxAssetsNetCurrent |
Prepayments | 95,819 us-gaap_PrepaidExpenseCurrent |  | 136,374 us-gaap_PrepaidExpenseCurrent |
Other current assets | 6,582 us-gaap_OtherAssetsCurrent |  | 7,324 us-gaap_OtherAssetsCurrent |
Total current assets | 1,243,846 us-gaap_AssetsCurrent |  | 1,440,277 us-gaap_AssetsCurrent |
Net property, plant and equipment | 329,038 us-gaap_PropertyPlantAndEquipmentNet |  | 275,236 us-gaap_PropertyPlantAndEquipmentNet |
Marketable securities | 470,789 us-gaap_AvailableForSaleSecuritiesNoncurrent |  | 271,078 us-gaap_AvailableForSaleSecuritiesNoncurrent |
Deferred tax assets | 7,494 us-gaap_DeferredTaxAssetsNetNoncurrent |  | 5,217 us-gaap_DeferredTaxAssetsNetNoncurrent |
Other assets | 10,419 us-gaap_OtherAssetsNoncurrent |  | 14,591 us-gaap_OtherAssetsNoncurrent |
Retirement plans assets | 12,896 us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent |  | 9,342 us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent |
Intangible assets, net | 190,600 us-gaap_IntangibleAssetsNetExcludingGoodwill |  | 252,291 us-gaap_IntangibleAssetsNetExcludingGoodwill |
Goodwill | 273,438 us-gaap_Goodwill |  | 361,792 us-gaap_Goodwill |
Total assets | 2,538,520 us-gaap_Assets | [1] | 2,629,824 us-gaap_Assets | [1]
Current liabilities: |  |  |  |
Accounts payable | 47,763 us-gaap_AccountsPayableCurrent |  | 62,874 us-gaap_AccountsPayableCurrent |
Accrued employees' compensation and withholdings | 100,994 us-gaap_EmployeeRelatedLiabilitiesCurrent |  | 95,619 us-gaap_EmployeeRelatedLiabilitiesCurrent |
Deferred revenue and customer advances | 71,603 ter_DeferredRevenueAndCustomerAdvancesCurrent |  | 55,404 ter_DeferredRevenueAndCustomerAdvancesCurrent |
Other accrued liabilities | 51,997 us-gaap_OtherAccruedLiabilitiesCurrent |  | 63,712 us-gaap_OtherAccruedLiabilitiesCurrent |
Accrued income taxes | 20,049 us-gaap_AccruedIncomeTaxesCurrent |  | 11,360 us-gaap_AccruedIncomeTaxesCurrent |
Debt |  |  | 186,663 us-gaap_DebtCurrent |
Total current liabilities | 292,406 us-gaap_LiabilitiesCurrent |  | 475,632 us-gaap_LiabilitiesCurrent |
Long-term deferred revenue and customer advances | 19,929 us-gaap_DeferredRevenueNoncurrent |  | 13,756 us-gaap_DeferredRevenueNoncurrent |
Retirement plans liabilities | 108,460 us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent |  | 91,517 us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent |
Deferred tax liabilities | 23,315 us-gaap_DeferredTaxLiabilitiesNoncurrent |  | 40,686 us-gaap_DeferredTaxLiabilitiesNoncurrent |
Long-term other accrued liabilities | 15,430 us-gaap_OtherAccruedLiabilitiesNoncurrent |  | 23,139 us-gaap_OtherAccruedLiabilitiesNoncurrent |
Total liabilities | 459,540 us-gaap_Liabilities |  | 644,730 us-gaap_Liabilities |
Commitments and contingencies (Note J) |  |  |  |
SHAREHOLDERS' EQUITY |  |  |  |
Common stock, $0.125 par value, 1,000,000 shares authorized, 216,613 and 191,731 shares issued and outstanding at December 31, 2014 and 2013, respectively | 27,077 us-gaap_CommonStockValue |  | 23,966 us-gaap_CommonStockValue |
Additional paid-in capital | 1,437,135 us-gaap_AdditionalPaidInCapital |  | 1,390,896 us-gaap_AdditionalPaidInCapital |
Accumulated other comprehensive income | 4,689 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |  | 4,000 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |
Retained earnings | 610,079 us-gaap_RetainedEarningsAccumulatedDeficit |  | 566,232 us-gaap_RetainedEarningsAccumulatedDeficit |
Total shareholders' equity | 2,078,980 us-gaap_StockholdersEquity |  | 1,985,094 us-gaap_StockholdersEquity |
Total liabilities and shareholders' equity | $ 2,538,520 us-gaap_LiabilitiesAndStockholdersEquity |  | $ 2,629,824 us-gaap_LiabilitiesAndStockholdersEquity |
[1] | Total business assets are directly attributable to each business. Corporate assets consist of cash and cash equivalents, marketable securities and certain other assets.

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- Definition The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. Also includes customer advance payments represent a part or a full amount of a contractually due sum that is paid in advance of the delivery of goods or services. + References No definition available. + Details
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