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NATURE OF OPERATIONS AND ACCOUNTING POLICIES Property and Equipment (Details) (USD $)
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3 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2011
Service Life and Salvage Value [Member]
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Jun. 30, 2011
Helicopter [Member]
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Dec. 31, 2013
Helicopter [Member]
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Dec. 31, 2013
Helicopter [Member]
Service Life and Salvage Value [Member]
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Dec. 31, 2013
Machinery and Equipment [Member]
Minimum [Member]
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Dec. 31, 2013
Machinery and Equipment [Member]
Maximum [Member]
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Dec. 31, 2013
Buildings and Leasehold Improvements [Member]
Minimum [Member]
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Dec. 31, 2013
Buildings and Leasehold Improvements [Member]
Maximum [Member]
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Dec. 31, 2013
Furniture, Fixtures, Vehicles and Other [Member]
Minimum [Member]
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Dec. 31, 2013
Furniture, Fixtures, Vehicles and Other [Member]
Maximum [Member]
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| Property, Plant and Equipment [Line Items] | |||||||||||||||||||||
| Useful life | 12 years | 15 years | 15 years | 5 years | 7 years | 10 years | 30 years | 3 years | 5 years | ||||||||||||
| Salvage value percentage | 30.00% | 40.00% | 40.00% | ||||||||||||||||||
| Operating Income | $ 9,558,000 | $ 11,196,000 | $ 10,792,000 | $ 14,617,000 | $ 9,724,000 | $ 11,092,000 | $ 7,401,000 | $ 3,834,000 | $ 46,163,000 | $ 32,051,000 | $ 36,108,000 | $ 7,600,000 | |||||||||
| Net Income | 1,677,000 | 5,088,000 | 4,950,000 | 6,589,000 | 3,531,000 | 5,200,000 | 3,648,000 | (4,632,000) | 18,304,000 | 7,747,000 | 2,108,000 | 4,900,000 | |||||||||
| Basic and Diluted Earnings (Loss) Per Common Share (in dollars per share) | $ 0.06 | $ 0.13 | $ 0.06 | $ (0.27) | $ 0.88 | $ (0.03) | $ 0.18 | $ 0.48 | |||||||||||||
| Capitalized interest | $ 1,100,000 | $ 1,500,000 | $ 2,700,000 | ||||||||||||||||||