|
Cash, Cash Equivalents and Investments (Tables)
|
3 Months Ended |
|
Mar. 31, 2014
|
| Cash, Cash Equivalents and Investments |
|
| Schedule of cash, cash equivalents and investments |
|
|
|
As of
|
|
As of
|
|
|
|
|
December 31,
|
|
March 31,
|
|
|
|
|
2013
|
|
2014
|
|
|
|
|
(in thousands)
|
|
|
Cash and cash equivalents:
|
|
|
|
|
|
|
Cash
|
|
$
|
89,176
|
|
$
|
60,096
|
|
|
Money market funds
|
|
98,437
|
|
90,531
|
|
|
Commercial paper
|
|
54,247
|
|
4,000
|
|
|
Corporate debt securities
|
|
3,895
|
|
6,169
|
|
|
Total cash and cash equivalents
|
|
$
|
245,755
|
|
$
|
160,796
|
|
|
Short-term investments:
|
|
|
|
|
|
|
Commercial paper
|
|
$
|
47,526
|
|
$
|
78,424
|
|
|
Corporate debt securities
|
|
50,436
|
|
101,372
|
|
|
U.S. government and government agency debt securities
|
|
700
|
|
700
|
|
|
Total short-term investments
|
|
$
|
98,662
|
|
$
|
180,496
|
|
|
Long-term investments:
|
|
|
|
|
|
|
Corporate debt securities
|
|
$
|
100,690
|
|
$
|
94,328
|
|
|
U.S. government and government agency debt securities
|
|
4,996
|
|
10,241
|
|
|
Total long-term investments
|
|
$
|
105,686
|
|
$
|
104,569
|
|
|
Cash, cash equivalents and investments
|
|
$
|
450,103
|
|
$
|
445,861
|
|
|
| Summary of available-for-sale securities' adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category |
|
|
|
As of December 31, 2013
|
|
|
|
|
Adjusted
|
|
Unrealized
|
|
Unrealized
|
|
Fair
|
|
|
|
|
Cost
|
|
Gains
|
|
Losses
|
|
Value
|
|
|
|
|
(in thousands)
|
|
|
Money market funds
|
|
$
|
98,437
|
|
$
|
—
|
|
$
|
—
|
|
$
|
98,437
|
|
|
Commercial paper
|
|
101,773
|
|
—
|
|
—
|
|
101,773
|
|
|
Corporate debt securities
|
|
155,273
|
|
6
|
|
(258
|
)
|
155,021
|
|
|
U.S. government and government agency debt securities
|
|
5,700
|
|
—
|
|
(4
|
)
|
5,696
|
|
|
Total cash equivalents and marketable securities
|
|
$
|
361,183
|
|
$
|
6
|
|
$
|
(262
|
)
|
$
|
360,927
|
|
|
|
|
As of March 31, 2014
|
|
|
|
|
Adjusted
|
|
Unrealized
|
|
Unrealized
|
|
Fair
|
|
|
|
|
Cost
|
|
Gains
|
|
Losses
|
|
Value
|
|
|
|
|
(in thousands)
|
|
|
Money market funds
|
|
$
|
90,531
|
|
$
|
—
|
|
$
|
—
|
|
$
|
90,531
|
|
|
Commercial paper
|
|
82,424
|
|
—
|
|
—
|
|
82,424
|
|
|
Corporate debt securities
|
|
202,000
|
|
28
|
|
(159
|
)
|
201,869
|
|
|
U.S. government and government agency debt securities
|
|
10,952
|
|
—
|
|
(11
|
)
|
10,941
|
|
|
Total cash equivalents and marketable securities
|
|
$
|
385,907
|
|
$
|
28
|
|
$
|
(170
|
)
|
$
|
385,765
|
|
|
| Schedule of available-for-sale investments by contractual maturity date |
|
|
|
As of December 31, 2013
|
|
|
|
|
Adjusted
Cost
|
|
Fair Value
|
|
|
|
|
(in thousands)
|
|
|
Due in one year or less
|
|
$
|
255,278
|
|
$
|
255,241
|
|
|
Due after one year through three years
|
|
105,905
|
|
105,686
|
|
|
Total
|
|
$
|
361,183
|
|
$
|
360,927
|
|
|
|
|
As of March 31, 2014
|
|
|
|
|
Adjusted
Cost
|
|
Fair Value
|
|
|
|
|
(in thousands)
|
|
|
Due in one year or less
|
|
$
|
281,237
|
|
$
|
281,196
|
|
|
Due after one year through three years
|
|
104,670
|
|
104,569
|
|
|
Total
|
|
$
|
385,907
|
|
$
|
385,765
|
|
|