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Schedule Of Foreign Currency Exchange Rate Fluctuations [Table Text Block] Schedule of Foreign Currency Translation Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Grants (in shares) Assets Total assets Total assets Income Statement [Abstract] Income Statement [Abstract] Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Deferred Income Tax Expense (Benefit) Deferred income taxes Earnings Per Share, Diluted Diluted net income per common share (in dollars per share) Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information By Segment Operating Segments [Member] Operating Segments City Area Code City Area Code Stock Repurchase Program 2011 [Member] Stock Repurchase Program 2011 [Member] Stock Repurchase Program 2011 Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition [Line Items] Represents the amount of certain yard operation expenses associated with vehicles consigned to and received by, but not sold as of the balance sheet date. Vehicle Pooling Costs Vehicle pooling costs Stock Issued During Period, Value, Employee Stock Purchase Plan Shares issued for Employee Stock Purchase Plan Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Cash and Cash Equivalents, Policy [Policy Text Block] Cash, Cash Equivalents, and Restricted Cash Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Operating Income (Loss) Operating income Operating income Retained Earnings [Member] Retained Earnings Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Share repurchase program, number of shares authorized to be repurchased Share Repurchase Program, Authorized, Number of Shares Common stock authorized for repurchase (in shares) Net cash (use) provided by financing activities Net Cash Provided by (Used in) Financing Activities Change in Accounting Principle, Accounting Standards Update, Adopted [true false] Deferred Income Tax Liabilities, Net Deferred income taxes Nonoperating Income (Expense) [Abstract] Other income (expense): Non-US [Member] International Entity Interactive Data Current Entity Interactive Data Current Statement of Income Location, Balance [Domain] Income Statement Location [Domain] Accounting Standards Update and Change in Accounting Principle [Text Block] Recent Accounting Pronouncements Present value of lessee's discounted obligation for lease payments from operating and finance leases, classified as current. Operating And Finance Lease Liability, Current Current portion of operating and finance lease liabilities Contract with Customer, Asset, after Allowance for Credit Loss Ending balance Beginning balance Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss Investment in held to maturity securities Amortized Cost Investment in held to maturity securities, carrying value Cash Equivalents, at Carrying Value Cash equivalents, carrying value Share-Based Payment Arrangement, Expense, Tax Benefit Tax benefits Entity Tax Identification Number Entity Tax Identification Number Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Effect of foreign currency translation Local Phone Number Local Phone Number Accounting Policies [Abstract] Accounting Policies [Abstract] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Forfeitures or expirations (in shares) Entity Emerging Growth Company Entity Emerging Growth Company