Note 12 - Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fluids Systems [Member]
Revenues
Revenues			$ 581,136	$ 965,049	$ 926,392
Depreciation and Amortization
Depreciation and amortization			22,108	22,934	26,679
Operating Income (loss)
Operating Income (loss)			(86,770)	95,600	72,604
Segment Assets
Assets	$ 549,827	$ 778,148	549,827	778,148	733,340
Capital Expenditures
Capital Expenditures			40,533	36,626	39,316
Mats and Integrated Services [Member]
Revenues
Revenues			95,729	153,367	115,964
Depreciation and Amortization
Depreciation and amortization			18,869	15,507	10,501
Operating Income (loss)
Operating Income (loss)			24,949	70,526	49,394
Segment Assets
Assets	172,415	175,318	172,415	175,318	112,619
Capital Expenditures
Capital Expenditures			27,456	64,101	26,455
Corporate Segment [Member]
Depreciation and Amortization
Depreciation and amortization			2,940	2,734	2,584
Operating Income (loss)
Operating Income (loss)			(37,278)	(35,530)	(27,553)
Segment Assets
Assets	$ 126,651	$ 54,206	126,651	54,206	29,939
Capital Expenditures
Capital Expenditures			1,415	5,215	464
Continuing Operations [Member]
Depreciation and Amortization
Depreciation and amortization			43,917	41,175	39,764
Capital Expenditures
Capital Expenditures			$ 69,404	$ 105,942	66,235
Discontinued Operations [Member]
Segment Assets
Assets of discontinued operations					79,020
Revenues			$ 676,865	$ 1,118,416	1,042,356
Depreciation and amortization			43,917	42,030	44,198
Operating Income (loss)	$ (94,282)	$ 38,591	(99,099)	130,596	94,445
Assets	$ 848,893	$ 1,007,672	$ 848,893	$ 1,007,672	$ 954,918