CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 35,282	$ 33,418
Other comprehensive income (loss) net of tax:
Net unrealized losses on available-for-sales securities	(2,636)	(2,519)
Related tax benefit	969	926
Reclassification adjustment of net gain from sale of available-for-sale securities included in net income	0	0
Related tax benefit (expense)	0	0
Other comprehensive loss	(1,667)	(1,593)
Comprehensive income	$ 33,615	$ 31,825