Segment Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue, Major Customer [Line Items]
Revenues	$ 115,315	$ 163,644	$ 229,859	$ 372,108
Operating Income (Loss)	(15,135)	(1,682)	(33,960)	4,446
Employee termination costs	856	732	4,292	3,653
Fluids systems
Revenue, Major Customer [Line Items]
Revenues	96,153	140,344	194,804	312,246
Operating Income (Loss)	(11,924)	(223)	(27,131)	(1,925)
Employee termination costs	738	707	3,919	3,337
Mats and integrated services
Revenue, Major Customer [Line Items]
Revenues	19,162	23,300	35,055	59,862
Operating Income (Loss)	3,989	6,555	7,725	22,202
Employee termination costs	91	22	250	217
Corporate office
Revenue, Major Customer [Line Items]
Operating Income (Loss)	(7,200)	(8,014)	(14,554)	(15,831)
Employee termination costs	27	3	123	99
Cost of revenues
Revenue, Major Customer [Line Items]
Employee termination costs	720	319	3,425	2,518
Selling, general and administrative expenses
Revenue, Major Customer [Line Items]
Employee termination costs	$ 136	$ 413	$ 867	$ 1,135