Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Details)

v3.3.1.900
INCOME TAXES (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Provision for income taxes [Abstract]      
Current federal provision $ 4,062,000 $ 8,756,000 $ 6,748,000
Current state provision 285,000 296,000 233,000
Deferred federal provision (benefit) 5,367,000 (1,893,000) 1,173,000
Deferred state provision (benefit) 50,000 (12,000) (7,000)
Income tax expense $ 9,764,000 $ 7,147,000 $ 8,147,000
Federal statutory rate 35.00% 35.00% 35.00%
Effective tax rate in income tax expense and the Federal statutory rate [Abstract]      
Income taxes at U.S. statutory rate $ 9,927,000 $ 7,952,000 $ 9,675,000
State taxes, net of federal benefit 230,000 181,000 139,000
Permanent and other items (393,000) (915,000) (644,000)
Increase (decrease) in valuation allowance 0 (71,000) (1,023,000)
Income tax expense 9,764,000 7,147,000 8,147,000
Deferred tax liabilities [Abstract]      
Plant, pipeline and equipment (14,996,000) (8,352,000)  
Intangible assets (284,000) 0  
Other assets (14,000) 0  
Investment in AMAK (2,522,000) (4,382,000)  
Total deferred tax liabilities (17,816,000) (12,734,000)  
Deferred tax assets [Abstract]      
Accounts receivable 283,000 276,000  
Inventory 1,785,000 1,018,000  
Mineral interests 376,000 376,000  
Unrealized loss on swap agreements 62,000 196,000  
Post-retirement benefits 330,000 327,000  
Stock-based compensation 969,000 1,705,000  
Intangible assets 0 229,000  
Deferred revenue 0 164,000  
Gross deferred tax assets 3,805,000 4,291,000  
Valuation allowance (376,000) (376,000)  
Total net deferred tax assets 3,429,000 3,915,000  
Net deferred tax liabilities (14,387,000) (8,819,000)  
Current [Abstract]      
Deferred tax asset 2,116,000 1,652,000  
Non-current [Abstract]      
Deferred tax assets 4,637,000 3,269,000  
Deferred tax liability (20,764,000) (13,364,000)  
Valuation allowance (376,000) (376,000)  
Non-current deferred tax liability, net (16,503,000) (10,471,000)  
Net deferred tax liabilities (14,387,000) (8,819,000)  
Decrease in valuation allowance   (71,000) (1,023,000)
Income tax liability in Saudi Arabia $ 0 $ 0 $ 0