Annual report pursuant to Section 13 and 15(d)

NATURE OF OPERATIONS AND ACCOUNTING POLICIES Property and Equipment (Details)

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NATURE OF OPERATIONS AND ACCOUNTING POLICIES Property and Equipment (Details) (USD $)
3 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2011
Service Life and Salvage Value [Member]
Jun. 30, 2011
Helicopter [Member]
Dec. 31, 2013
Helicopter [Member]
Dec. 31, 2013
Helicopter [Member]
Service Life and Salvage Value [Member]
Dec. 31, 2013
Machinery and Equipment [Member]
Minimum [Member]
Dec. 31, 2013
Machinery and Equipment [Member]
Maximum [Member]
Dec. 31, 2013
Buildings and Leasehold Improvements [Member]
Minimum [Member]
Dec. 31, 2013
Buildings and Leasehold Improvements [Member]
Maximum [Member]
Dec. 31, 2013
Furniture, Fixtures, Vehicles and Other [Member]
Minimum [Member]
Dec. 31, 2013
Furniture, Fixtures, Vehicles and Other [Member]
Maximum [Member]
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