XML 82 R67.htm IDEA: XBRL DOCUMENT v3.8.0.1

Cash Dividends (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Dividends Payable [Line Items]
Cash dividends paid, per share	$ 0.08	$ 0.16	$ 0.40
Cash dividends paid	$ 16,315	$ 23,579	$ 58,775
Installment 1, FY 2017
Dividends Payable [Line Items]
Cash dividends paid, date	Mar. 22, 2017
Cash dividends paid, per share	$ 0.02
Cash dividends paid	$ 3,326
Installment 2, FY 2017
Dividends Payable [Line Items]
Cash dividends paid, date	Jun. 22, 2017
Cash dividends paid, per share	$ 0.02
Cash dividends paid	$ 4,269
Installment 3, FY 2017
Dividends Payable [Line Items]
Cash dividends paid, date	Sep. 21, 2017
Cash dividends paid, per share	$ 0.02
Cash dividends paid	$ 4,271
Installment 4, FY 2017
Dividends Payable [Line Items]
Cash dividends paid, date	Dec. 21, 2017
Cash dividends paid, per share	$ 0.02
Cash dividends paid	$ 4,449
Installment 1, FY 2016
Dividends Payable [Line Items]
Cash dividends paid, date		Mar. 24, 2016
Cash dividends paid, per share		$ 0.10
Cash dividends paid		$ 14,712
Installment 2, FY 2016
Dividends Payable [Line Items]
Cash dividends paid, date		Jun. 23, 2016
Cash dividends paid, per share		$ 0.02
Cash dividends paid		$ 2,953
Installment 3, FY 2016
Dividends Payable [Line Items]
Cash dividends paid, date		Sep. 22, 2016
Cash dividends paid, per share		$ 0.02
Cash dividends paid		$ 2,953
Installment 4, FY 2016
Dividends Payable [Line Items]
Cash dividends paid, date		Dec. 22, 2016
Cash dividends paid, per share		$ 0.02
Cash dividends paid		$ 2,961
Installment 1, FY 2015
Dividends Payable [Line Items]
Cash dividends paid, date			Mar. 25, 2015
Cash dividends paid, per share			$ 0.10
Cash dividends paid			$ 14,640
Installment 2, FY 2015
Dividends Payable [Line Items]
Cash dividends paid, date			Jun. 24, 2015
Cash dividends paid, per share			$ 0.10
Cash dividends paid			$ 14,712
Installment 3, FY 2015
Dividends Payable [Line Items]
Cash dividends paid, date			Sep. 24, 2015
Cash dividends paid, per share			$ 0.10
Cash dividends paid			$ 14,712
Installment 4, FY 2015
Dividends Payable [Line Items]
Cash dividends paid, date			Dec. 24, 2015
Cash dividends paid, per share			$ 0.10
Cash dividends paid			$ 14,711

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_DividendsCommonStockCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentOneFiscalYearTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentTwoFiscalYearTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentThreeFiscalYearTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentFourFiscalYearTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentOneFiscalYearTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentTwoFiscalYearTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentThreeFiscalYearTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentFourFiscalYearTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentOneFiscalYearTwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentTwoFiscalYearTwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentThreeFiscalYearTwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=pten_InstallmentFourFiscalYearTwoThousandFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: