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Marketable Securities
 6 Months Ended
Mar. 31, 2013
Marketable Securities
Marketable Securities
The Company invests its cash in marketable securities and classifies them as available-for-sale. The Company records these securities at fair value. Marketable securities reported as current assets represent investments that mature within one year from the balance sheet date. Long-term marketable securities represent investments with maturity dates greater than one year from the balance sheet date. At the time that the maturity dates of these investments become one year or less, the securities are reclassified to current assets. Unrealized gains and losses are excluded from earnings and reported in a separate component of stockholders’ equity until they are sold or mature. At the time of sale, any gains or losses, calculated by the specific identification method, will be recognized as a component of operating results.
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 March 31, 2013 and September 30, 2012 (in thousands):
 
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair Value
March 31, 2013:
 
 
 
 
 
 
 
U.S. Treasury securities and obligations of U.S. government agencies
$
22,786

 
$
9

 
$
(1
)
 
$
22,794

Corporate securities
37,581

 
26

 
(32
)
 
37,575

Mortgage-backed securities
1,171

 
39

 
—

 
1,210

Other debt securities
62

 
—

 
—

 
62

Municipal securities
19,755

 
10

 
(2
)
 
19,763

Bank certificate of deposits
4,049

 
—

 
—

 
4,049

 
$
85,404

 
$
84

 
$
(35
)
 
$
85,453

September 30, 2012:
 
 
 
 
 
 
 
U.S. Treasury securities and obligations of U.S. government agencies
$
41,202

 
$
15

 
$
(2
)
 
$
41,215

Corporate securities
64,102

 
138

 
(16
)
 
64,224

Mortgage-backed securities
1,310

 
42

 
(1
)
 
1,351

Other debt securities
13

 
—

 
—

 
13

Municipal securities
34,777

 
25

 
(1
)
 
34,801

Bank certificate of deposits
3,987

 
1

 
—

 
3,988

 
$
145,391

 
$
221

 
$
(20
)
 
$
145,592


The fair value of the marketable securities at March 31, 2013 by contractual maturity, are shown below (in thousands). Expected maturities will 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
$
46,242

Due after one year through five years
35,906

Due after ten years
3,305

 
$
85,453