Summary of Significant Accounting Policies and New Accounting Standards (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Net income	$ 19,425us-gaap_NetIncomeLoss	$ 6,370us-gaap_NetIncomeLoss	$ 55,311us-gaap_NetIncomeLoss	$ 14,515us-gaap_NetIncomeLoss
Weighted average number of shares - basic	38,998,000	30,458,000	38,951,000	30,458,000
Dilutive effect of stock options and warrant	921	199	815	67
Weighted average number of shares - diluted	39,919,000	30,657,000	39,766,000	30,525,000
Net income per share:
basic (in dollars per share)	$ 0.50us-gaap_EarningsPerShareBasic	$ 0.21us-gaap_EarningsPerShareBasic	$ 1.42us-gaap_EarningsPerShareBasic	$ 0.48us-gaap_EarningsPerShareBasic
diluted (in dollars per share)	$ 0.49us-gaap_EarningsPerShareDiluted	$ 0.21us-gaap_EarningsPerShareDiluted	$ 1.39us-gaap_EarningsPerShareDiluted	$ 0.48us-gaap_EarningsPerShareDiluted

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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