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Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands | 1 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2015 | Jun. 30, 2015
Commitments and Contingent Liabilities |  |
Lease period, minimum |  | 5 years
Lease period, maximum |  | 20 years
Loss Contingencies |  |
Letters of credit outstanding |  | $ 24,500
Surety bonds posted |  | 15,300
Holdings | Holdings Bond |  |
Loss Contingencies |  |
Senior unsecured notes issued |  | $ 700,000
Senior subordinated convertible notes, interest rate (as a percent) |  | 3.80%
Penske Truck Leasing Co., L.P. |  |
Loss Contingencies |  |
Ownership interest in Penske Truck Leasing Co (as a percent) | 9.00% | 9.00%
Mitsui and Co |  |
Loss Contingencies |  |
Ownership interest in Penske Truck Leasing Co (as a percent) | 20.00% | 20.00%
Purchase of ownership interest | 20.00% |
Penske Corporation |  |
Loss Contingencies |  |
Ownership interest in Penske Truck Leasing Co (as a percent) | 41.10% | 41.10%
GECC |  |
Loss Contingencies |  |
Ownership interest in Penske Truck Leasing Co (as a percent) | 29.90% | 29.90%
Guarantee of Indebtedness of Others | GECC |  |
Loss Contingencies |  |
Percentage of interest agreed to indemnify if GECC required to make any payments of principal or interest |  | 9.00%
Annual fee pay for acting as co-obligor |  | $ 950
Value of interest payments included in maximum amount of Company's potential obligations |  | $ 63,100

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