Segment Information (Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summarized financial information regarding reportable segments
Net revenue from external customers	$ 100,848	$ 98,388	$ 93,586	$ 78,243	$ 76,702	$ 78,628	$ 78,303	$ 79,195	$ 371,065	$ 312,828	$ 258,785
Gross margin	39,801	37,502	37,594	32,630	31,300	33,843	33,025	33,451	147,527	131,619	105,820
Income (loss) from operations									58,726	58,621	48,888
Depreciation and amortization									15,109	11,583	10,105
Total assets	375,581				219,867				375,581	219,867	232,012
Capital expenditures									15,007	20,701	9,984	9,984
Energy Chemical Technologies [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers									200,932	183,986	140,836
Gross margin									88,536	81,438	56,115
Income (loss) from operations									65,396	65,440	43,549
Depreciation and amortization									3,160	1,765	1,594
Total assets	127,119				59,195				127,119	59,195	54,958
Capital expenditures									5,225	3,553		2,231
Consumer and Industrial Chemical Technologies [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers									42,927	0	0
Gross margin									10,659	0	0
Income (loss) from operations									6,260	0	0
Depreciation and amortization									1,126	0	0
Total assets	86,640				0				86,640	0	0
Capital expenditures									183	0		0
Drilling [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers									112,406	116,736	102,470
Gross margin									43,156	45,709	43,607
Income (loss) from operations									18,306	22,282	23,035
Depreciation and amortization									9,632	9,115	8,061
Total assets	135,738				118,771				135,738	118,771	113,130
Capital expenditures									6,326	12,264		6,025
Artificial Lift [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers									14,800	12,106	15,479
Gross margin									5,176	4,472	6,098
Income (loss) from operations									3,060	3,395	4,296
Depreciation and amortization									250	206	196
Total assets	16,647				11,189				16,647	11,189	10,815
Capital expenditures									1,749	77		182
Corporate [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers									0	0	0
Gross margin									0	0	0
Income (loss) from operations									(34,296)	(32,496)	(21,992)
Depreciation and amortization									941	497	254
Total assets	9,437				30,712				9,437	30,712	53,109
Capital expenditures									$ 1,524	$ 4,807		$ 1,546