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Note 6 - Senior Notes, Credit Facility, and Capital Leases - Credit Facilities (Details) | 12 Months Ended
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Dec. 31, 2016
Leverage ratio (total debt less unencumbered cash/EBITDA) | 5 |
Maximum [Member] |  |
Senior leverage ratio (debt secured by liens/EBITDA) | 2.5 |
Leverage ratio (total debt less unencumbered cash/EBITDA) | 4 | [1]
Interest coverage ratio (EBITDA/interest expense) | 3 |
New Facility [Member] |  |
Standby fee per annum on undrawn amounts | 0.50% |
New Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |
Variable rate | 2.25% |
New Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |
Variable rate | 3.25% |
New Facility [Member] | Base Rate [Member] | Minimum [Member] |  |
Variable rate | 1.25% |
New Facility [Member] | Base Rate [Member] | Maximum [Member] |  |
Variable rate | 2.25% |
[1] | The leverage ratio was amended to be 5.00:1 for 2016, and reverted back to 4.00:1 effective January 1, 2017.

X
- Definition EBITDA/interest expense. + References No definition available. + Details
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Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total debt less unencumbered cash/EBITDA. + References No definition available. + Details
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Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt secured by liens/EBITDA. + References No definition available. + Details
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Data Type: | xbrli:pureItemType
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X
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X
- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Details
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- Details
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