Amount approved to replenish the Company's Stock Repurchase Program.

No definition available.

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- Definition

Stockholders Equity [Line Items]

+ References

No definition available.

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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-Section S99
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-Subparagraph (SX 210.5-02(28))
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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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Balance Type:	debit
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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

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Stockholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	May 27, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Aug. 02, 2019	Jun. 30, 2019	Mar. 31, 2019	Feb. 22, 2019	Feb. 21, 2019	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Stockholders Equity [Line Items]
Common stock, shares issued		94,012,743		94,012,743		93,400,929
Treasury stock, shares		15,790,463		15,790,463		10,174,589
Share Repurchase Program [Member]
Stockholders Equity [Line Items]
Share Repurchase Program, authorized amount							$ 250,000,000.0			$ 250,000,000.0	$ 250,000,000.0
Stock repurchases under Share Repurchase Program	$ 150,000,000.0					$ 158,000,000.0
Stock Repurchase Program, number of shares repurchased	5,615,874	0	0	5,615,874	0
Stock Repurchase Program, replenishment amount							$ 150,000,000.0
Common Stock [Member]
Stockholders Equity [Line Items]
Common stock, shares issued		94,012,743	93,234,871	94,012,743	93,234,871	93,400,929		93,884,971	93,748,617			93,060,175	92,889,547	92,637,403
Number of unvested shares		503,598		503,598
Restricted Stock Units [Member]
Stockholders Equity [Line Items]
Number of unvested shares		2,193,303		2,193,303