Fair Value Measurement: (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value Disclosures [Abstract] 
Fair Value, Measurement Inputs, Disclosure [Table Text Block]
The following table provides the assets and liabilities carried at fair value measured on a recurring basis.
 
 
Fair value measurements at September 30, 2011 using
 
Total carrying
value at
September 30, 2011
 
Quoted prices
in active
markets for
identical
assets (level 1)
 
Significant
other
observable
inputs (level 2)
 
Significant
unobservable
inputs (level 3)
Available for sale securities
$
52,153


 
$
5,079


 
$
47,074


 
$
—


 
$
52,153


 
$
5,079


 
$
47,074


 
$
—


 
 
 
Fair value measurements at December 31, 2010 using
 
Total carrying
value at
December 31, 2010
 
Quoted prices
in active
markets for
identical
assets (level 1)
 
Significant
other
observable
inputs (level 2)
 
Significant
unobservable
inputs (level 3)
Available for sale securities
$
14,507


 
$
2,820


 
$
11,687


 
$
—


 
$
14,507


 
$
2,820


 
$
11,687


 
$
—


 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The following table presents the change in the fair values for Level 3 items for the three and nine months ended September 30, 2010:
 
Level 3 changes in fair value (pre-tax):
 
 
Three months ended September 30, 2010
 
Nine months ended September 30, 2010
Beginning balance
$
750


 
$
900


Transfer into Level 3
—


 
—


Sales
(750
)
 
(900
)
Unrealized holding loss, included in other comprehensive income
—


 
—


Ending balance
$
—


 
$
—