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

6 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of net income per share and weighted average shares

​	Three Months						Six Months
For the Periods Ended December 31	2015			2014			2015			2014
Net income	​	$	30,178	​	$	14,248	​	$	48,931	​	$	33,180
Weighted average number of shares – basic	​	​	39,163	​	​	38,957	​	​	39,128	​	​	38,928
Dilutive effect of stock options and warrant	​	​	815	​	​	856	​	​	867	​	​	762
Weighted average number of shares – diluted	​	​	39,978	​	​	39,813	​	​	39,995	​	​	39,690
Net income per share:	​	​	​	​	​	​	​	​	​	​	​	​
basic	​	$	0.77	​	$	0.37	​	$	1.25	​	$	0.85
diluted	​	$	0.75	​	$	0.36	​	$	1.22	​	$	0.84