Stockholders' Equity (Tables)

6 Months Ended

Mar. 31, 2014

Stockholders' Equity

Summary of RSU activity

	Unvested Restricted Stock Units
			Weighted-
			Average Grant-
	Number of Shares		Date Fair Value
Unvested at September 30, 2013	421,369		$	43.76
Granted	263,506		49.51
Vested	(69,994	)	43.76
Forfeited	(458	)	43.76
Unvested at December 31, 2013	614,423		46.22
Granted	21,158		52.00
Vested	—		—
Forfeited	(8,522	)	49.88
Unvested at March 31, 2014	627,059		$	46.46