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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill by Operating Segment

Goodwill — Goodwill by operating segment as of December 31, 2017 and 2016 and changes for the years then ended are as follows (in thousands):

		Contract				Pressure				Directional				Oilfield
		Drilling				Pumping				Drilling				Rental				Total
Balance December 31, 2015 and 2016		$	86,234			$	—			$	—			$	—			$	86,234
Goodwill acquired			308,826				121,444				88,685				6,284				525,239
Balance December 31, 2017		$	395,060			$	121,444			$	88,685			$	6,284			$	611,473

Summary of Segment and Weighted Average Useful Life of Intangible Assets

The following table identifies the segment and weighted average useful life of each of the Company’s intangible assets:

				Weighted Average
		Segment		Useful Life
				(in years)
Customer relationships		Pressure pumping		7.00
Customer relationships		Directional drilling		3.00
Developed technology		Directional drilling		10.00
Favorable drilling contracts		Contract drilling		0.83
Internal use software		Directional drilling		5.00

Gross Carrying Amount and Accumulated Amortization of Intangible Assets

The gross carrying amount and accumulated amortization of intangible assets as of December 31, 2017 and 2016 are as follows (in thousands):

		2017												2016
		Gross Carrying				Accumulated				Net Carrying				Gross Carrying				Accumulated				Net Carrying
		Amount				Amortization				Amount				Amount				Amortization				Amount
Customer relationships		$	26,200			$	(1,943	)		$	24,257			$	25,500			$	(22,768	)		$	2,732
Developed technology			48,000				(1,137	)			46,863				—				—				—
Favorable drilling contracts			22,500				(18,482	)			4,018				—				—				—
Internal use software			482				(21	)			461				—				—				—
		$	97,182			$	(21,583	)		$	75,599			$	25,500			$	(22,768	)		$	2,732

Remaining Amortization Expense Associated with Finite-Lived Intangible Assets

The remaining amortization expense associated with finite-lived intangible assets is expected to be as follows (in thousands):

Year ending December 31,
2018		$	17,580
2019			13,630
2020			11,686
2021			4,896
2022			4,875
Thereafter			22,932
Total		$	75,599

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- Definition

Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
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Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267

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Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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