Related Party Transactions (Details) - Jerry Atkin	Jun. 13, 2019 $ / shares shares
Related Party Transactions
Common stock purchased and cancelled (in shares) \| shares	268,025
Share price (in dollars per share) \| $ / shares	$ 60.24
Period of trading days prior to repurchase to calculate volume-weighted average closing price	5 days

Number of shares that have been repurchased and retired during the period.

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

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-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration