Stockholders' Equity (Narratives) (Details) - USD ($)			1 Months Ended	3 Months Ended
	Nov. 07, 2019	Nov. 08, 2018	Feb. 29, 2020	Sep. 30, 2020	Sep. 30, 2019	Nov. 02, 2018
Class Of Stock [Line Items]
Stock repurchase, authorized amount			$ 100,000,000.0			$ 60,000,000.0
Maximum amount of common stock may be repurchased in calendar year						$ 30,000,000.0
Stock repurchase, increase in authorized amount			$ 40,000,000.0
Stock repurchase, extended period			3 years
Stock repurchase, extended period, effective date			Feb. 05, 2020
Total number of shares repurchased				0	0
2013 Equity Incentive Plan
Class Of Stock [Line Items]
Increase in authorized shares for issuance	7,000,000.0
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Increase in authorized shares for issuance		7,500,000