Correction of Interim Consolidated Financial Statements (Details 1) - USD ($) $ 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
Consolidated statements of comprehensive income
Net income (loss)	$ 16,696	$ 14,248	$ 18,932	$ 6,370	$ 33,180	$ 49,876	$ 14,515
Other comprehensive income (loss)	(16,217)	(6,078)	(8,575)	3,415	(14,653)	(30,870)	625
Comprehensive income (loss)	479	8,170	10,357	$ 9,785	18,527	19,006	$ 15,140
As reported
Consolidated statements of comprehensive income
Net income (loss)	19,425	15,405	20,481		35,886	55,311
Other comprehensive income (loss)	(18,946)	(7,235)	(10,124)		(17,359)	(36,305)
Comprehensive income (loss)	479	8,170	10,357		18,527	19,006
Correction
Consolidated statements of comprehensive income
Net income (loss)	(2,729)	(1,157)	(1,549)		(2,706)	(5,435)
Other comprehensive income (loss)	$ 2,729	$ 1,157	$ 1,549		$ 2,706	$ 5,435
Comprehensive income (loss)