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Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Total shares excluded from diluted net income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Restricted Stock Units Unvested restricted stock units Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Schedule of Shares Excluded From Calculation of Diluted Net Income Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Other items, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating 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