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Comprehensive Income
9 Months Ended
Sep. 30, 2011
Comprehensive Income (Loss) [Abstract] 
Comprehensive Income Note [Text Block]
Comprehensive Income
    The difference between net income and comprehensive income for the Company is due to currency translation adjustments and unrealized gains on investments.
    The components of comprehensive income are as follows:


Three Months Ended September 30,

Nine Months Ended September 30,


2011

2010

2011

2010
Net income

$
5,300


$
8,903


$
18,996


$
17,461

Change in net unrealized losses on investments, net of tax

(5
)

26


(11
)

42

Change in currency translation adjustments

(942
)

951


(770
)

454

Total comprehensive income

$
4,353


$
9,880


$
18,215


$
17,957