Acquisitions (Details) (Go-Coil [Member], USD $)	Dec. 31, 2011
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 110,400,000
Business Acquisition, Purchase Price Allocation [Abstract]
Cash acquired	313,000
Other current assets	9,068,000
Property and equipment	30,103,000
Intangibles and other assets	33,695,000
Goodwill	41,683,000
Total assets acquired	114,862,000
Current liabilities	4,337,000
Long-term debt	131,000
Total liabilities assumed	4,468,000
Net assets acquired	$ 110,394,000
Onshore [Member]
Business Acquisition [Line Items]
Coiled Tubing Units	7
Offshore [Member]
Business Acquisition [Line Items]
Coiled Tubing Units	3