Marketable Securities (Tables)

3 Months Ended

Dec. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities Including Accrued Interest Receivable

The following is a summary of marketable securities (included in short and long-term marketable securities in the Consolidated Balance Sheets), including accrued interest receivable, as of December 31, 2013 and September 30, 2013 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
December 31, 2013:
U.S. Treasury securities and obligations of U.S. government agencies	$	20,179	$	3	$	(22	)	$	20,160
Corporate securities	42,801		44		(55		)	42,790
Mortgage-backed securities	1,075		26		(5		)	1,096
Other debt securities	34		—		—			34
Municipal securities	25,026		8		(11		)	25,023
Bank certificate of deposits	8,551		—		(2		)	8,549
	$	97,666	$	81	$	(95	)	$	97,652
September 30, 2013:
U.S. Treasury securities and obligations of U.S. government agencies	$	19,528	$	6	$	(13	)	$	19,521
Corporate securities	35,045		11		(47		)	35,009
Mortgage-backed securities	1,093		25		(1		)	1,117
Other debt securities	88		—		—			88
Municipal securities	25,199		15		(7		)	25,207
Bank certificate of deposits	9,451		—		(2		)	9,449
	$	90,404	$	57	$	(70	)	$	90,391

Fair Value of Marketable Securities by Contractual Maturity

The fair value of the marketable securities at December 31, 2013 by contractual maturity, are shown below (in thousands). Expected maturities could differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.

	Fair Value
Due in one year or less	$	45,420
Due after one year through five years	48,842
Due after ten years	3,390
	$	97,652