Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018		Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 110,042		$ 113,887
Accounts receivable, net of allowance of $5,002 at June 30, 2018 and $4,269 at December 31, 2017	411,165		367,906
Inventories, net	83,092		77,793
Prepaid and other current assets	32,503		33,011
Total current assets	636,802		592,597
Property, plant and equipment, net of accumulated depreciation of $227,160 at June 30, 2018 and $133,755 at December 31, 2017	746,814		703,029
Other assets:
Goodwill	146,015		147,515
Intangible assets, net	119,445		123,837
Deferred financing costs, net of accumulated amortization of $2,464 at June 30, 2018 and $608 at December 31, 2017	4,667		3,379
Other noncurrent assets	28,967		38,500
Total assets	1,682,710		1,608,857
Current liabilities:
Accounts payable	187,166		138,624
Payroll and related costs	41,014		52,812
Accrued expenses	59,110		67,414
Total current liabilities	287,290		258,850
Deferred tax liabilities	2,560		3,917
Other long-term liabilities	26,464		24,668
Total liabilities	316,314		287,435
Commitments and contingencies
us-gaap_StockholdersEquityAbstract
Common stock, par value of $0.01, 1,000,000,000 shares authorized, 68,386,944 and 68,546,820 issued and outstanding at June 30, 2018 and December 31, 2017, respectively	684		686
Additional paid-in capital	1,307,585		1,298,859
Accumulated other comprehensive loss	(260)		(580)
Retained earnings	58,387		22,457
Total stockholders' equity	1,366,396	[1]	1,321,422
Total liabilities and stockholders’ equity	$ 1,682,710		$ 1,608,857

[1] Unaudited