Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill — Goodwill by operating segment as of September 30, 2015 and changes for the nine months then ended are as follows (in thousands):

	Contract		Pressure
	Drilling		Pumping			Total
Balance, December 31, 2014	$	86,234	$	124,561		$	210,795
Changes to goodwill	—			(124,561	)		(124,561	)
Balance, September 30, 2015	$	86,234	$	—		$	86,234

Gross Carrying Amount and Accumulated Amortization of Customer Relationships

The following table presents the gross carrying amount and accumulated amortization of the customer relationships as of September 30, 2015 and December 31, 2014 (in thousands):

	September 30, 2015							December 31, 2014
	Gross					Net		Gross					Net
	Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	Amount		Amortization			Amount		Amount		Amortization			Amount
Customer relationships	$	25,500	$	(18,214	)	$	7,286	$	25,500	$	(15,482	)	$	10,018