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Consolidated Statements of Stockholders' Equity (Parenthetical) - shares	1 Months Ended					12 Months Ended		36 Months Ended
	Aug. 24, 2019	Sep. 30, 2017	Aug. 26, 2017	Apr. 01, 2017	Feb. 25, 2017	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Treasury Stock, Shares, Acquired	44,500	240,933	4,490	173,288	900,997	44,500	1,319,708	1,364,208

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- References

No definition available.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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