CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 19,372	$ 13,154	$ 37,213	$ 25,336
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) from available-for-sale securities, net of tax expense (benefit) of $579 and $793 for the three months ended December 31, 2014 and 2013, and $(105) and $817 for the six months ended December 31, 2014 and 2013, respectively.	(867)	(1,190)	139	(1,227)
Other-than-temporary impairment on held-to-maturity securities recognized in other comprehensive income, net of tax expense (benefit) of $(256) and $431 for the three months ended December 31, 2014 and 2013, and $(1,258) and $0 for the six months ended December 31, 2014 and 2013, respectively.	384	(647)	1,662	0
Reclassification of net (gain) loss from available-for-sale securities included in income, net of tax expense (benefit) of $235 and $0 for the three months ended December 31, 2014 and 2013 and $235 and $0 for the six months ended December 31, 2014 and 2013, respectively.	(352)	0	(352)	0
Other comprehensive income (loss)	(835)	(1,837)	1,449	(1,227)
Comprehensive income	$ 18,537	$ 11,317	$ 38,662	$ 24,109