Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2013

Goodwill by Operating Segment

Goodwill — Goodwill by operating segment as of June 30, 2013 and changes for the six months then ended are as follows (in thousands):

	Contract Drilling		Pressure Pumping		Total
Balance December 31, 2012	$	86,234	$	67,575	$	153,809
Changes to goodwill		—		—		—
Balance June 30, 2013	$	86,234	$	67,575	$	153,809

Gross Carrying Amount and Accumulated Amortization of Intangible Assets

The following table presents the gross carrying amount and accumulated amortization of intangible assets as of June 30, 2013 and December 31, 2012 (in thousands):

	June 30, 2013							December 31, 2012
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Non-compete agreement	$	1,400	$	(1,283	)	$	117	$	1,400	$	(1,050	)	$	350
Customer relationships		25,500		(10,018	)		15,482		25,500		(8,196	)		17,304
Total intangible assets	$	26,900	$	(11,301	)	$	15,599	$	26,900	$	(9,246	)	$	17,654