XML 90 R76.htm IDEA: XBRL DOCUMENT v3.20.4

Additional Information with Respect to Options Granted, Vested and Exercised (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Aggregate grant date fair value of stock options vested during the year	$ 89	$ 543	$ 1,954

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value of Options Vested.

+ References

No definition available.

+ Details

Name:	pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfOptionsVested
Namespace Prefix:	pten_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration