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Investments and Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2011
Investments and Fair Value Measurements [Abstract] 
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
The amortized cost and fair value of available-for-sale investments at September 30, 2011 and December 31, 2010 were as follows:
 
 
 
 
Gross
 
Gross
 
 
 
 
Amortized
 
Unrealized
 
Unrealized
 
Fair
 
 
Cost
 
Gains
 
Losses
 
Value
 
 
( in thousands)
September 30, 2011
 
 
Current:
 
 
 
 
 
 
 
 
     Auction rate student loan educational bonds
 
$
11,325

 
$

 
$

 
$
11,325

 
 
$
11,325

 
$

 
$

 
$
11,325

Long-term:
 
 

 
 

 
 

 
 

     Auction rate student loan educational bonds
 
$
56,225

 
$

 
$
3,081

 
$
53,144

 
 
$
56,225

 
$

 
$
3,081

 
$
53,144

 
 
$
67,550

 
$

 
$
3,081

 
$
64,469


December 31, 2010
 
 
 
 
 
 
 
 
Current:
 
 
 
 
 
 
 
 
     Auction rate student loan educational bonds
 
$
8,300

 
$

 
$

 
8,300

 
 
$
8,300

 

 
$

 
$
8,300

Long-term:
 
 

 
 

 
 

 
 

     Auction rate student loan educational bonds
 
$
83,475

 
$

 
$
3,081

 
$
80,394

 
 
$
83,475

 

 
$
3,081

 
$
80,394

 
 
$
91,775

 

 
$
3,081

 
$
88,694


Investments Classified by Contractual Maturity Date [Table Text Block]
 
 
Fair Value
 
Amortized Cost
Due within one year
 
$
11,325

 
$
11,325

Due after one year through five years
 

 

Due after five years through ten years
 

 

Due after ten years through May 1, 2040
 
53,144

 
56,225

 
 
$
64,469

 
$
67,550

Schedule of Inputs Used in Securities Models [Table Text Block]
Inputs used in Company models of all securities held as of September 30, 2011 and December 31, 2010, excluding investments whose fair value is estimated to be par value as of the reporting period due to call notices being received by the Company were as follows:
 
September 30, 2011
 
December 31, 2010
 
Average life of underlying loans
2-12 years
 
2-12 years
 
Rate of return
0.70-2.62%
 
1.28-4.12%
 
Discount rate
0.28-0.93%
 
0.53-1.85%
 
Liquidity discount rate
0.55-0.97%
 
0.40-0.80%
 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The table below presents a reconciliation for all assets and liabilities, measured at fair value, on a recurring basis using significant unobservable inputs (Level 3) during the three months ended September 30, 2011 and 2010.
 
 

Available-for-sale
debt securities
 
 
(in thousands)
 
 
2011
 
2010
Balance, January 1
 
$
88,694

 
$
147,419

Settlements
 
(24,225
)
 
(50,325
)
Purchases
 

 

Issuances
 

 

Sales
 

 

Transfers in to (out of) Level 3
 

 

Total gains or losses (realized/unrealized):
 
 
 
 

Included in earnings
 

 

Included in other comprehensive loss, net of tax
 

 
2,500

Balance, September 30,
 
$
64,469

 
$
99,594