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Marketable Securities
 6 Months Ended
Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities
Marketable Securities
The Company invests 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 as a separate component of accumulated other comprehensive income until the security is sold or matures. 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, 2015 and September 30, 2014 (in thousands): 
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair Value
March 31, 2015:
 
 
 
 
 
 
 
U.S. Treasury securities and obligations of U.S. government agencies
$
27,402

 
$
17

 
$
(2
)
 
$
27,417

Corporate securities
61,377

 
26

 
(38
)
 
61,365

Mortgage-backed securities
911

 
30

 
—

 
941

Other debt securities
6,270

 
2

 
—

 
6,272

Municipal securities
19,936

 
2

 
(14
)
 
19,924

Bank certificate of deposits
16,946

 
1,063

 
—

 
18,009

 
$
132,842

 
$
1,140

 
$
(54
)
 
$
133,928

September 30, 2014:
 
 
 
 
 
 
 
U.S. Treasury securities and obligations of U.S. government agencies
$
26,052

 
$
1

 
$
(39
)
 
$
26,014

Corporate securities
74,614

 
23

 
(174
)
 
74,463

Mortgage-backed securities
964

 
36

 
—

 
1,000

Other debt securities
7,358

 
—

 
(10
)
 
7,348

Municipal securities
15,888

 
1

 
(16
)
 
15,873

Bank certificate of deposits
26,645

 
2

 
(3
)
 
26,644

 
$
151,521

 
$
63

 
$
(242
)
 
$
151,342


The fair value of the marketable securities at March 31, 2015 by contractual maturity, are shown below (in thousands):
 
Fair Value
Due in one year or less
$
69,327

Due after one year through five years
61,247

Due after ten years
3,354

 
$
133,928


Expected maturities could differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.