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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Cash Flows from Operating Activities: |  |  |
Net income | $ 191,624us-gaap_ProfitLoss | $ 171,926us-gaap_ProfitLoss | $ 162,420us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operations: |  |  |
Depreciation | 146,893us-gaap_Depreciation | 144,923us-gaap_Depreciation | 133,845us-gaap_Depreciation
Amortization | 5,325us-gaap_AdjustmentForAmortization | 5,033us-gaap_AdjustmentForAmortization | 3,177us-gaap_AdjustmentForAmortization
Stock option based compensation | 17,971us-gaap_ShareBasedCompensation | 13,728us-gaap_ShareBasedCompensation | 12,695us-gaap_ShareBasedCompensation
Provisions for / (recoveries of) bad debts | 741us-gaap_ProvisionForDoubtfulAccounts | (385)us-gaap_ProvisionForDoubtfulAccounts | (595)us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes | (18,973)us-gaap_DeferredIncomeTaxExpenseBenefit | 6,844us-gaap_DeferredIncomeTaxExpenseBenefit | (9,015)us-gaap_DeferredIncomeTaxExpenseBenefit
Defined benefit plan expense | 16,699us-gaap_EmployeeBenefitsAndShareBasedCompensation | 19,408us-gaap_EmployeeBenefitsAndShareBasedCompensation | 14,611us-gaap_EmployeeBenefitsAndShareBasedCompensation
Equity in results of affiliates | 1,917us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions | 883us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions | 457us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions
Changes in balance sheet items, excluding effects from foreign currency adjustments and impact of acquisition: |  |  |
Accounts and other receivables | (16,322)us-gaap_IncreaseDecreaseInAccountsReceivable | (32,806)us-gaap_IncreaseDecreaseInAccountsReceivable | 16,689us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories | 5,205us-gaap_IncreaseDecreaseInInventories | (29,918)us-gaap_IncreaseDecreaseInInventories | (19,712)us-gaap_IncreaseDecreaseInInventories
Prepaid and other current assets | (6,496)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (6,394)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | 10,124us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable and accrued liabilities | (24,319)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 1,144us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | (824)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Income taxes payable | (10,949)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | 16,712us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | 2,969us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Retirement and deferred compensation plan liabilities | (370)us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations | (19,441)us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations | (2,073)us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations
Other changes, net | 5,605us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | (6,221)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet | (10,876)us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Net cash provided by operations | 314,551us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 285,436us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 313,892us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash Flows from Investing Activities: |  |  |
Capital expenditures | (161,940)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (151,510)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (174,053)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Disposition of property and equipment | 5,106us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 436us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 2,629us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Intangible assets | (9)us-gaap_PaymentsToAcquireIntangibleAssets | (725)us-gaap_PaymentsToAcquireIntangibleAssets |
Acquisition of business, net of cash acquired |  |  | (187,840)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Investment in unconsolidated affiliate |  | (5,256)us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates | (279)us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates
Notes receivable, net | (2,357)us-gaap_ProceedsFromCollectionOfNotesReceivable | (65)us-gaap_ProceedsFromCollectionOfNotesReceivable | 84us-gaap_ProceedsFromCollectionOfNotesReceivable
Net cash used by investing activities | (159,200)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (157,120)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (359,459)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash Flows from Financing Activities: |  |  |
Proceeds from notes payable | 95,816us-gaap_ProceedsFromNotesPayable | 94,184us-gaap_ProceedsFromNotesPayable |
Repayments of notes payable |  |  | (134,034)us-gaap_RepaymentsOfNotesPayable
Proceeds from long-term obligations | 253,520us-gaap_ProceedsFromIssuanceOfLongTermDebt | 2,994us-gaap_ProceedsFromIssuanceOfLongTermDebt | 125,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
Repayments of long-term obligations | (778)us-gaap_RepaymentsOfLongTermDebt | (28,320)us-gaap_RepaymentsOfLongTermDebt | (3,042)us-gaap_RepaymentsOfLongTermDebt
Dividends paid | (71,072)us-gaap_PaymentsOfDividendsCommonStock | (66,133)us-gaap_PaymentsOfDividendsCommonStock | (58,442)us-gaap_PaymentsOfDividendsCommonStock
Credit facility costs | (720)us-gaap_PaymentsOfDebtIssuanceCosts | (498)us-gaap_PaymentsOfDebtIssuanceCosts | (1,518)us-gaap_PaymentsOfDebtIssuanceCosts
Proceeds from stock option exercises | 37,793us-gaap_ProceedsFromStockOptionsExercised | 43,348us-gaap_ProceedsFromStockOptionsExercised | 44,637us-gaap_ProceedsFromStockOptionsExercised
Purchase of treasury stock | (340,517)us-gaap_PaymentsForRepurchaseOfCommonStock | (118,813)us-gaap_PaymentsForRepurchaseOfCommonStock | (79,793)us-gaap_PaymentsForRepurchaseOfCommonStock
Excess tax benefit from exercise of stock options | 6,998us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 6,104us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 7,809us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Net cash used by financing activities | (18,960)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (67,134)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (99,383)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of Exchange Rate Changes on Cash | (46,490)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations | 18,924us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations | (2,911)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations
Net increase/(decrease) in Cash and Equivalents | 89,901us-gaap_NetCashProvidedByUsedInContinuingOperations | 80,106us-gaap_NetCashProvidedByUsedInContinuingOperations | (147,861)us-gaap_NetCashProvidedByUsedInContinuingOperations
Cash and Equivalents at Beginning of Period | 309,861us-gaap_CashAndCashEquivalentsAtCarryingValue | 229,755us-gaap_CashAndCashEquivalentsAtCarryingValue | 377,616us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and Equivalents at End of Period | 399,762us-gaap_CashAndCashEquivalentsAtCarryingValue | 309,861us-gaap_CashAndCashEquivalentsAtCarryingValue | 229,755us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental Cash Flow Disclosure: |  |  |
Interest paid | 20,352us-gaap_InterestPaid | 20,679us-gaap_InterestPaid | 17,464us-gaap_InterestPaid
Income taxes paid | $ 94,578us-gaap_IncomeTaxesPaid | $ 47,445us-gaap_IncomeTaxesPaid | $ 64,523us-gaap_IncomeTaxesPaid

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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