XML 46 R35.htm IDEA: XBRL DOCUMENT v3.19.1

Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Option Assumptions

The following weighted average assumptions were used to determine the fair value of the stock options granted on the original grant date for expense recognition purposes for options granted during the three months ended March 31, 2019 and 2018 using a Black Scholes-Merton Model:

	Three months ended
	March 31, 2019				March 31, 2018
Directors and Officers:
Expected dividend rate	$	0.32			$	0.26
Expected volatility	29.54		%		29.73		%
Risk-free interest rate	2.40		%		2.20		%
Expected life (in years)	5.0				5.0
Employees:
Expected dividend rate	$	0.32			$	0.26
Expected volatility	29.54		%		29.82		%
Risk-free interest rate	2.40		%		2.48		%
Expected life (in years)	5.0				5.0

Summary of Stock Options Outstanding

The following is a summary of stock options vested and exercisable as of March 31, 2019:

Range of Exercise Prices								Number of Shares			Weighted Average Remaining Contractual Life (in years)			Weighted Average Exercise Price				Intrinsic Value (in thousands)
$	6.13		-	$	33.20			496,465			6.11			$	22.56			$	11,727
$	33.40		-	$	40.87			187,024			8.28			35.53				1,991
$	41.37		-	$	46.18			—			—			—				—
				Total				683,489			6.70			$	26.11			$	13,718

The following is a summary of stock options vested and exercisable as of March 31, 2018:

Range of Exercise Prices								Number of Shares			Weighted Average Remaining Contractual Life (in years)		Weighted Average Exercise Price				Intrinsic Value (in thousands)
$	4.54		-	$	32.80			486,601			5.19		$	16.32			$	11,036
$	32.85		-	$	34.10			65,054			5.64		34.06				322
$	34.15		-	$	39.00			9,193			8.90		34.45				42
				Total				560,848			5.30		$	18.67			$	11,400

Summary of Stock Option Activity

A summary of option activity under the plans is as follows:

	Shares			Weighted Average Exercise Price
Outstanding at December 31, 2018	2,445,849			$	30.77
Granted	1,933,920			41.36
Exercised	(146,114	)		27.43
Forfeited or Expired	(58,198	)		34.33
Outstanding at March 31, 2019	4,175,457			$	35.74
Exercisable at March 31, 2019	683,489			$	26.11

Summary of Unvested Restricted Stock Awards

A summary of the unvested restricted stock awards is as follows:

	Shares			Weighted Average Grant Date Fair Value
Unvested at December 31, 2018	292,450			$	28.54
Granted	93,000			39.87
Vested	(50,620	)		26.91
Forfeited	(2,578	)		27.32
Unvested at March 31, 2019	332,252			$	31.97

Summary of Share-Based Compensation Expense

A summary of share-based compensation is as follows: 

	Three months ended
	March 31, 2019				March 31, 2018
Grant date fair value of awards during the period:	(in thousands)
Options	$	19,944			$	12,527
Restricted stock	3,708				2,114
Total	$	23,652			$	14,641
Share-based compensation expense:
Options	$	1,225			$	758
Restricted stock	805				966
Total	$	2,030			$	1,724
Income tax benefit/(deficiency) related to share-based compensation:
Options	$	243			$	301
Restricted stock	151				162
Total	$	394			$	463

X

- Definition

Tabular disclosure of share based compensation related to options and restricted stock.

+ References

No definition available.

+ Details

Name:	aaon_ScheduleOfShareBasedCompensationExpenseTableTextBlock
Namespace Prefix:	aaon_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
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

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109197908&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 option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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