XML 46 R24.htm IDEA: XBRL DOCUMENT v2.4.1.9

Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Weighted-Average Assumptions Used to Estimate Grant Date Fair Values for Stock Options Granted

Weighted-average assumptions used to estimate the grant date fair values for stock options granted for the three month periods ended March 31, 2015 and 2014 follow:

	Three Months Ended
	March 31,
	2015				2014
Volatility		38.47	%			35.91	%
Expected term (in years)		5.00				5.00
Dividend yield		2.41	%			0.79	%
Risk-free interest rate		1.65	%			1.75	%

Stock Option Activity

Stock option activity from January 1, 2015 to March 31, 2015 follows:

					Weighted
					Average
	Underlying				Exercise
	Shares				Price
Outstanding at January 1, 2015		6,086,250			$	22.32
Granted		60,000			$	16.59
Exercised		—				—
Cancelled		—				—
Expired		—				—
Outstanding at March 31, 2015		6,146,250			$	22.26
Exercisable at March 31, 2015		5,390,683			$	21.44

Restricted Stock Activity

Restricted stock activity from January 1, 2015 to March 31, 2015 follows:

					Weighted
					Average
					Grant Date
	Shares				Fair Value
Non-vested restricted stock outstanding at January 1, 2015		1,493,059			$	26.93
Granted		18,000			$	16.59
Vested		(57,356	)		$	21.65
Forfeited		(15,590	)		$	28.08
Non-vested restricted stock outstanding March 31, 2015		1,438,113			$	27.00

Restricted Stock Unit Activity

Restricted stock unit activity from January 1, 2015 to March 31, 2015 follows:

					Weighted
					Average
					Grant Date
	Shares				Fair Value
Non-vested restricted stock units outstanding at January 1, 2015		34,085			$	30.20
Granted		—			$	—
Vested		—			$	—
Forfeited		—			$	—
Non-vested restricted stock units outstanding March 31, 2015		34,085			$	30.20

Stock-Settled Performance Units

The total target number of shares with respect to the Stock-Settled Performance Units is set forth below:

	2014				2013				2012				2011
	Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards
Target number of shares		154,000				236,500				192,000				144,375

Fair Value of Stock-Settled Performance Units

The fair value of the Stock-Settled Performance Units is set forth below (in thousands):

	2014				2013				2012				2011
	Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards
Fair value at date of grant	$	5,388			$	5,564			$	3,065			$	5,569

Compensation Expense Associated with Stock-Settled Performance Units

These fair value amounts are charged to expense on a straight-line basis over the performance period. Compensation expense associated with the Stock-Settled Performance Units is shown below (in thousands):

	2014				2013				2012				2011
	Performance				Performance				Performance				Performance
	Unit Awards				Unit Awards				Unit Awards				Unit Awards
Three months ended March 31, 2015	$	449			$	464			$	255			NA
Three months ended March 31, 2014	NA				$	464			$	255			$	464

X

- Definition

Share based compensation arrangement by share based payment award fair value.

+ References

No definition available.

+ Details

Name:	pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueTableTextBlock
Namespace Prefix:	pten_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share Based Compensation Expense by Award Type [Table Text Block]

+ References

No definition available.

+ Details

Name:	pten_ShareBasedCompensationExpenseByAwardTypeTextBlock
Namespace Prefix:	pten_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested restricted stock units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration