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Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Principal Transactions Revenue [Table Text Block] |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Trade barter revenue |  | $ | 1,248 |  |  | $ | 1,529 |  |  | $ | 1,481 |
Trade barter expense |  |  | (1,267 | ) |  |  | (1,421 | ) |  |  | (1,354 | )
Net trade barter (loss) income |  | $ | (19 | ) |  | $ | 108 |  |  | $ | 127 |
Property, Plant and Equipment [Table Text Block] |
|  | December 31, |  | Estimated Useful Lives
|  | 2012 |  |  | 2011 |  | (in years)
Property and equipment: |  |  |  |  |  |  |  |  |
Land |  | $ | 24,383 |  |  | $ | 23,451 |  |  |  |
Buildings and improvements |  |  | 55,709 |  |  |  | 53,322 |  | 7 | to | 40
Equipment |  |  | 313,761 |  |  |  | 308,454 |  | 3 | to | 20
|  |  | 393,853 |  |  |  | 385,227 |  |  |  |
Accumulated depreciation |  |  | (258,715 | ) |  |  | (248,128 | ) |  |  |
Total property and equipment, net |  | $ | 135,138 |  |  | $ | 137,099 |  |  |  |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Weighted-average shares outstanding – basic |  |  | 57,170 |  |  |  | 57,117 |  |  |  | 54,322 |
Weighted-average shares underlying stock options and restricted shares |  |  | 92 |  |  |  | 1 |  |  |  | 2 |
Weighted-average shares outstanding - diluted |  |  | 57,262 |  |  |  | 57,118 |  |  |  | 54,324 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | December 31, |
|  | 2012 |  |  | 2011 |
Accumulated balances of items included in accumulated other comprehensive loss: |  |  |  |  |  |
Increase in pension liability |  | $ | (33,065 | ) |  | $ | (26,889 | )
Income tax benefit |  |  | (12,895 | ) |  |  | (10,487 | )
Accumulated other comprehensive loss |  | $ | (20,170 | ) |  | $ | (16,402 | )

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- Definition Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of revenue by reporting categories or types of financial instruments, including derivatives but excluding dividends and interests, from trading for own account by broker dealers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 80 -Subparagraph Exhibit 4-8, 12 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6475986&loc=d3e42567-110969 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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