Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 221,775	$ 77,627
Accounts receivable, net	91,248	90,648
Inventories	141,736	135,547
Prepaid expenses and other assets	45,294	51,880
Total current assets	500,053	355,702
Property, plant and equipment, net	591,265	587,397
Goodwill	16,080	16,080
Intangible assets, net	25,944	27,127
Investments	12,153	12,250
Other assets	7,275	7,040
TOTAL ASSETS	1,152,770	1,005,596
CURRENT LIABILITIES:
Lines of credit	7,844	65,525
Current maturities of long-term debt	176,746	13,397
Accounts payable	120,733	84,608
Accrued expenses and other liabilities	31,549	39,187
Deferred revenue	161	2,218
Total current liabilities	337,033	204,935
Unfavorable lease obligation	2,823	3,388
Deferred income taxes	8,430	8,192
Long-term contingent consideration for acquisitions	3,311	8,849
Long-term debt (net of debt issuance costs of $4,592 and $6,627, respectively)	31,006	208,536
Other liabilities	3,379	4,114
Total liabilities	385,982	438,014
COMMITMENTS AND CONTINGENCIES
EQUITY:
Common stock ($.0001 par value; 300,000,000 shares authorized; 37,258,737 and 38,837,749 shares outstanding, respectively)	5	5
Common stock—additional paid-in-capital	495,532	515,452
Retained earnings	383,167	134,928
Accumulated other comprehensive income	(826)	278
Treasury stock (11,498,350 and 9,363,166 shares outstanding, respectively)	(111,090)	(83,081)
Total equity	766,788	567,582
TOTAL LIABILITIES AND EQUITY	$ 1,152,770	$ 1,005,596

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.