Segment Information - Revenue from External Customers (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenue from External Customer [Line Items]
Total revenue	$ 277,437	$ 264,492
Adjusted EBITDA	100,290	102,281
Operating segments | International Services
Revenue from External Customer [Line Items]
Total revenue	124,201	118,585
Adjusted EBITDA	52,285	51,028
Operating segments | U.S. Services
Revenue from External Customer [Line Items]
Total revenue	109,286	103,755
Adjusted EBITDA	44,893	41,879
Operating segments | Tubular Sales Segment
Revenue from External Customer [Line Items]
Total revenue	43,950	42,152
Adjusted EBITDA	3,119	9,374
Operating segments | Corporate and other
Revenue from External Customer [Line Items]
Adjusted EBITDA	(7)	0
Inter-segment | International Services
Revenue from External Customer [Line Items]
Total revenue	377	141
Inter-segment | U.S. Services
Revenue from External Customer [Line Items]
Total revenue	7,914	5,100
Inter-segment | Tubular Sales Segment
Revenue from External Customer [Line Items]
Total revenue	11,891	16,096
Inter-segment | Corporate and other
Revenue from External Customer [Line Items]
Total revenue	$ (20,182)	$ (21,337)