Summary of Significant Accounting Policies and New Accounting Standards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Net income	$ 16,696	$ 14,248	$ 18,932	$ 6,370	$ 33,180	$ 49,876	$ 14,515
Weighted average number of shares - basic	38,998			30,458		38,951	30,458
Dilutive effect of stock options and warrant	921			199		815	67
Weighted average number of shares - diluted	39,919			30,657		39,766	30,525
Net income per share:
basic (in dollars per share)	$ 0.43	$ 0.37	$ 0.49	$ 0.21	$ 0.85	$ 1.28	$ 0.48
diluted (in dollars per share)	$ 0.42	$ 0.36	$ 0.48	$ 0.21	$ 0.84	$ 1.25	$ 0.48