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Note 12 - Notes Payable (Details) - Notes Payable (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | $ 3,186,047 |  | $ 3,192,127 |
Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | 1,140,900 |  | 965,900 |
Interest Rate Range (Low) | 3.13% |  | 4.70% |
Interest Rate Range (High) | 6.88% |  | 6.88% |
Medium-term Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | 1,044,600 |  | 1,144,600 |
Interest Rate Range (Low) | 4.30% |  | 4.30% |
Interest Rate Range (High) | 5.78% |  | 5.78% |
Unsecured Debt [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | 400,000 | [1] | 400,000 |
Interest Rate Range (Low) |  | [1],[2] |  | [2]
Interest Rate Range (High) |  | [1],[2] |  | [2]
Canadian Notes Payable [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | 329,500 |  | 352,400 |
Interest Rate Range (Low) | 3.86% |  | 5.18% |
Interest Rate Range (High) | 5.99% |  | 5.99% |
Line of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | 194,500 |  | 249,900 |
Interest Rate Range (Low) |  | [2] |  | [2]
Interest Rate Range (High) |  | [2] |  | [2]
Mexican Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) | 76,500 | [3] | 76,900 |
Interest Rate Range (Low) |  | [3] | 8.58% |
Interest Rate Range (High) |  | [3] | 8.58% |
Notes Payable, Other Payables [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Balance (in Dollars) |  |  | $ 2,400 | [4]
Interest Rate Range (Low) |  |  |  | [4]
Interest Rate Range (High) |  |  |  | [4]
[1] | During January 2014, the Company exercised its one-year extension option to extend the maturity date to April 17, 2015.
[2] | Interest rate is equal to LIBOR + 1.05% (1.22% and 1.26% at December 31, 2013 and 2012, respectively).
[3] | Interest rate is equal to TIIE (Equilibrium Interbank Interest Rate) plus 1.35% (5.15% at December 31, 2013).
[4] | Interest rate is equal to LIBOR + 3.50% (5.50% at December 31, 2012).

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- Definition Maximum contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Minimum contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
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