Stockholders' Equity (Details) - USD ($)				1 Months Ended	9 Months Ended
	May 18, 2017	Feb. 17, 2017	Nov. 22, 2016	Jun. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Jun. 07, 2017	Mar. 08, 2017	Dec. 07, 2016	Oct. 06, 2016
Class of Stock [Line Items]
Number of common stock sold in public offering (in shares)				7,145,000
Price per share (in dollars per share)				$ 14.00
Proceeds from sale of common stock				$ 95,029,000
Aggregate registered amount available for sale of securities under shelf registration statement					$ 74,970,000
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Stock repurchase program, remaining authorized repurchase amount					8,664,000
Maximum amount authorized by the Board of Directors for repurchases of the Company's common stock					$ 100,000,000
Repurchases of common stock (in shares)					0	0
Dividends [Abstract]
Quarterly dividend payment amount per share (in dollars per share)								$ 0.10	$ 0.10	$ 0.30
Dividends, cash paid (in dollars per share)		$ 0.10	$ 0.30
Subsequent Event
Class of Stock [Line Items]
Aggregate registered amount available for sale of securities under shelf registration statement							$ 74,970,000
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Stock repurchase program, remaining authorized repurchase amount							$ 8,664,000
Dividends [Abstract]
Quarterly dividend payment amount per share (in dollars per share)							$ 0.10
Dividends, cash paid (in dollars per share)	$ 0.10