Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 302.2	$ 444.1
Accounts receivable	233.0	197.0
Accounts receivable from related party	0.5	0.0
Inventory, net of lower of cost or market valuation	307.6	469.6
Other current assets	145.5	136.0
Total current assets	988.8	1,246.7
Property, plant and equipment:
Property, plant and equipment	2,100.1	1,952.9
Less: accumulated depreciation	(579.0)	(509.6)
Property, plant and equipment, net	1,521.1	1,443.3
Goodwill	74.4	73.9
Other intangibles, net	27.3	21.4
Equity method investments	605.2	0.0
Other non-current assets	108.1	103.4
Total assets	3,324.9	2,888.7
Current liabilities:
Accounts payable	397.6	476.7
Current portion of long-term debt and capital lease obligations	95.2	55.7
Obligation under Supply and Offtake Agreement	132.0	200.9
Accrued expenses and other current liabilities	134.9	122.9
Total current liabilities	759.7	856.2
Non-current liabilities:
Long-term debt and capital lease obligations, net of current portion	880.5	531.6
Environmental liabilities, net of current portion	7.9	8.5
Asset retirement obligations	9.7	9.2
Deferred tax liabilities	247.9	266.3
Other non-current liabilities	65.3	18.5
Total non-current liabilities	1,211.3	834.1
Stockholders' equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued and outstanding	0.0	0.0
Common stock, $0.01 par value, 110,000,000 shares authorized, 66,946,721 shares and 60,637,525 shares issued at December 31, 2015 and December 31, 2014, respectively	0.7	0.6
Additional paid-in capital	639.2	395.1
Accumulated other comprehensive loss	(45.3)	(12.6)
Treasury stock, 4,809,701 shares and 3,365,561 shares, at cost, as of December 31, 2015 and December 31, 2014, respectively	(154.8)	(112.6)
Retained earnings	713.5	731.2
Non-controlling interest in subsidiaries	200.6	196.7
Total stockholders' equity	1,353.9	1,198.4
Total liabilities and stockholders' equity	$ 3,324.9	$ 2,888.7