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Notes Payable and Long-Term Debt (Details) (USD $) | 12 Months Ended |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Notes payable to bank | Dec. 31, 2012 Notes payable to bank | Dec. 31, 2013 Committed bank line | Feb. 23, 2013 Committed bank line | Dec. 31, 2013 Uncommitted bank lines | Dec. 31, 2013 Uncommitted bank lines Foreign subsidiaries | Dec. 31, 2013 Uncommitted bank lines Foreign subsidiaries South African Rand | Dec. 31, 2013 Uncommitted bank lines Foreign subsidiaries Argentine pesos | Dec. 31, 2013 IDRBs | Jun. 29, 2013 IDRBs | Mar. 30, 2013 IDRBs
Notes Payable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes payable to banks |  |  |  | $ 67,699,000 | $ 28,786,000 | $ 0 |  |  | $ 67,699,000 | $ 26,981,000 | $ 24,348,000 |  |  |
Repayment term |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Maximum capacity |  |  |  |  |  | 200,000,000 | 200,000,000 | 209,501,000 | 159,501,000 |  |  |  |  |
Weighted average interest rate (as a percent) |  |  |  | 13.10% | 7.45% |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  | 813,000 |  | 3,980,000 |  |  |  |  |  |
Payments of long-term debt | $ 53,756,000 | $ 43,947,000 | $ 1,476,000 |  |  |  |  |  |  |  |  | $ 18,000,000 | $ 10,800,000 | $ 13,000,000

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