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Investments (Tables)
 3 Months Ended
Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost and Fair Value of Held to Maturity Investments
Amortized cost and fair value for investments classified as held-to-maturity at December 31, 2014 were as follows:
 
 
 
 
 
 
 
 
 
Estimated
 
 
Amortized
 
Gross Unrealized
 
Fair Market
 
 
Cost
 
Gains
 
Losses
 
Value
Due in less than 1 year:
 
 
 
 
 
 
 
 
Municipal bonds
 
$
25,291

 
$
15

 
$
—

 
$
25,306

Corporate bonds
 
19,488

 
—

 
(24
)
 
19,464

Certificates of deposit
 
4,129

 
—

 
—

 
4,129

Due in 1 - 2 years:
 
 
 
 
 
 
 
 
Municipal bonds
 
5,389

 
10

 
—

 
5,399

Corporate bonds
 
2,818

 
—

 
(6
)
 
$
2,812

Certificates of deposit
 
1,087

 
—

 
—

 
1,087

 
 
$
58,202

 
$
25

 
$
(30
)
 
$
58,197


Amortized cost and fair value for investments classified as held-to-maturity at September 30, 2014 were as follows:
 
 
 
 
 
 
 
 
 
Estimated
 
 
Amortized
 
Gross Unrealized
 
Fair Market
 
 
Cost
 
Gains
 
Losses
 
Value
Due in less than 1 year:
 
 
 
 
 
 
 
 
Municipal bonds
 
$
26,894

 
$
20

 
$
—

 
$
26,914

Corporate bonds
 
16,836

 
1

 
(24
)
 
16,813

Certificates of deposit
 
2,176

 
—

 
—

 
2,176

Due in 1 - 2 years:
 
 
 
 
 
 
 
 
Municipal bonds
 
4,230

 
7

 
—

 
4,237

Corporate bonds
 
4,054

 
—

 
(13
)
 
$
4,041

Certificates of deposit
 
2,973

 
—

 
—

 
2,973

 
 
$
57,163

 
$
28

 
$
(37
)
 
$
57,154