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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Name:	us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Stockholders' Equity (Narratives) (Details) - USD ($)		3 Months Ended
Stockholders' Equity (Narratives) (Details) - USD ($)	Nov. 07, 2019	Sep. 30, 2019	Sep. 30, 2018	Nov. 02, 2018
Class Of Stock [Line Items]
Stock repurchase, authorized amount				$ 60,000,000.0
Maximum amount of common stock may be repurchased in calendar year		$ 35,000,000.0
Stock repurchased, shares		0	0
2014 Employee Stock Purchase Plan \| Subsequent event [Member]
Class Of Stock [Line Items]
Increase in authorized shares for issuance	7,500,000