Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 164,052	$ 47,081
Accounts receivable, net	106,350	310,731
Inventories	133,781	85,890
Prepaid expenses and other assets	43,273	31,882
Total current assets	447,456	475,584
Property, plant and equipment, net	600,530	574,584
Goodwill	16,080	16,080
Intangible assets, net	30,624	30,941
Investments	12,180	8,797
Other assets	11,672	11,819
Restricted cash	105,815	105,815
TOTAL ASSETS	1,224,357	1,223,620
CURRENT LIABILITIES:
Lines of credit	2,864	23,149
Current maturities of long-term debt	9,109	5,206
Accounts payable	246,580	236,817
Accrued expenses and other liabilities	28,192	28,799
Total current liabilities	286,745	293,971
Unfavorable lease obligation	16,886	17,343
Deferred income taxes	19,020	19,186
Contingent consideration for acquisitions	28,890	26,949
Long-term debt (net of debt issuance costs of $3,817 and $4,105, respectively)	251,154	247,251
Other liabilities	4,856	4,910
Total liabilities	$ 607,551	$ 609,610
COMMITMENTS AND CONTINGENCIES
EQUITY:
Common stock ($.0001 par value; 300,000,000 shares authorized; 43,723,893 and 43,837,714 shares outstanding, respectively)	$ 5	$ 4
Common stock—additional paid-in-capital	479,808	474,367
Retained earnings	171,336	169,680
Accumulated other comprehensive loss	(2,430)	(4,009)
Treasury stock (3,826,166 and 3,178,372 shares outstanding, respectively)	(34,579)	(28,762)
Total equity attributable to the Company's shareholders	614,140	611,280
Non-controlling interest	2,666	2,730
Total equity	616,806	614,010
TOTAL LIABILITIES AND EQUITY	$ 1,224,357	$ 1,223,620