| Schedule of investments |
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Gross Unrealized
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Losses
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Amortized
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Less than
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Greater than
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Estimated
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Cost
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Gains
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One Year
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One Year
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Fair Value
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(In thousands)
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September 30, 2015
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Short-term investments:
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Available-for-sale securities:
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U.S. government and agency debt securities
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$
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306,522
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$
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433
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$
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(6)
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$
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—
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$
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306,949
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Corporate debt securities
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211,428
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95
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(62)
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—
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211,461
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International government agency debt securities
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31,005
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12
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(7)
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—
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31,010
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Total short-term investments
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548,955
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540
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(75)
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—
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549,420
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Long-term investments:
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Available-for-sale securities:
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Corporate debt securities
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29,279
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—
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(151)
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—
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29,128
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U.S. government and agency debt securities
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12,998
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—
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(6)
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—
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12,992
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42,277
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—
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(157)
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—
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42,120
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Held-to-maturity securities:
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Certificates of deposit
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1,619
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—
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—
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—
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1,619
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Total long-term investments
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43,896
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—
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(157)
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—
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43,739
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Total investments
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$
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592,851
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$
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540
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$
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(232)
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$
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—
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$
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593,159
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December 31, 2014
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Short-term investments:
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Available-for-sale securities:
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U.S. government and agency debt securities
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$
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226,387
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$
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88
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$
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(15)
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$
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—
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$
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226,460
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Corporate debt securities
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140,900
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26
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(66)
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—
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140,860
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International government agency debt securities
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39,774
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13
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(5)
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—
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39,782
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Total short-term investments
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407,061
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127
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(86)
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—
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407,102
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Long-term investments:
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Available-for-sale securities:
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U.S. government and agency debt securities
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100,429
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—
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(196)
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(40)
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100,193
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Corporate debt securities
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61,187
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—
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(84)
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—
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61,103
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International government agency debt securities
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7,568
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—
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(2)
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(1)
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7,565
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169,184
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—
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(282)
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(41)
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168,861
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Held-to-maturity securities:
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Certificates of deposit
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1,619
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—
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—
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—
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1,619
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Total long-term investments
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170,803
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—
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(282)
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(41)
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170,480
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Total investments
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$
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577,864
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$
|
127
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$
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(368)
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$
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(41)
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$
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577,582
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| The cost and fair value of available-for-sale and held-to-maturity securities by contractual maturity |
The Company’s available-for-sale and held-to-maturity securities at September 30, 2015 had contractual maturities in the following periods:
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Available-for-sale
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Held-to-maturity
|
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Amortized
|
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Estimated
|
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Amortized
|
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Estimated
|
|
|
(In thousands)
|
|
Cost
|
|
Fair Value
|
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Cost
|
|
Fair Value
|
|
|
Within 1 year
|
|
$
|
356,179
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$
|
356,259
|
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$
|
1,619
|
|
$
|
1,619
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|
|
After 1 year through 5 years
|
|
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235,053
|
|
|
235,281
|
|
|
—
|
|
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—
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Total
|
|
$
|
591,232
|
|
$
|
591,540
|
|
$
|
1,619
|
|
$
|
1,619
|
|
|