Summary of Significant Accounting Policies and New Accounting Standards (Tables)

9 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Schedule of net income per share and weighted average shares

​	Three Months						Nine Months
For the Periods Ended March 31	2016			2015			2016			2015
Net income	​	$	18,577	​	$	16,696	​	$	67,508	​	$	49,876
Weighted average number of shares – basic	​	​	39,356	​	​	38,998	​	​	39,203	​	​	38,951
Dilutive effect of stock options and warrant	​	​	644	​	​	921	​	​	793	​	​	815
Weighted average number of shares – diluted	​	​	40,000	​	​	39,919	​	​	39,996	​	​	39,766
Net income per share:	​			​			​			​
basic	​	$	0.47	​	$	0.43	​	$	1.72	​	$	1.28
diluted	​	$	0.46	​	$	0.42	​	$	1.69	​	$	1.25