Stockholders' Equity (Details) - USD ($)			1 Months Ended	6 Months Ended
	Feb. 16, 2018	Nov. 17, 2017	Jun. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Mar. 07, 2018
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
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]
Dividends, cash paid (in dollars per share)		$ 0.10
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