Three Months Ended June 30,

Six Months Ended June 30,

2020

2019

2020

2019

Interest income

$

2,388

$

1,661

$

4,762

$

3,357

Amortization of premium on available-for-sale securities

(627

)

(95

)

(1,121

)

(216

)

Gain (loss) on deferred compensation plan investments

3,572

620

(178

)

2,555

Foreign currency exchange gain (loss)

(133

)

73

(130

)

(128

)

Other

-

(30

)

153

1

Total

$

5,200

$

2,229

$

3,486

$

5,569