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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Leasing Equipment, Accumulated Depreciation and Allowances | $ 2,933,886 | $ 2,533,446
Accounts Receivable, Allowances | 1,276 | 1,240
Debt, Unamortized Deferred Financing Costs | 39,781 | 44,889
Lease intangibles, Accumulated Amortization | $ 242,301 | $ 205,532
Treasury Stock, Shares (in shares) | 8,771,345 | 1,853,148
Designated Common Stock [Member] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 270,000,000 | 270,000,000
Common stock, shares issued (in shares) | 80,979,833 | 80,843,472
Undesignated Common Stock [Member] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 13,800,000 | 30,000,000

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