Basis of Presentation (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Reconciliation of basic earnings per share ("EPS") to diluted EPS
Net income available to common stockholders	$ 10,051us-gaap_NetIncomeLoss	$ 12,087us-gaap_NetIncomeLoss	$ 51,444us-gaap_NetIncomeLoss
Basic weighted-average shares outstanding	49,208	48,899
Dilutive effect of potential common stock equivalents — stock options and restricted stock units	200	166
Diluted weighted-average shares outstanding	49,408	49,065
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0
Earnings per common share:
Basic (in dollars per share)	$ 0.20us-gaap_EarningsPerShareBasic	$ 0.25us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 0.20us-gaap_EarningsPerShareDiluted	$ 0.25us-gaap_EarningsPerShareDiluted

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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