|
Cash, Cash Equivalents and Investments (Tables)
|
6 Months Ended |
|
Jun. 30, 2014
|
| Cash, Cash Equivalents and Investments |
|
| Schedule of cash, cash equivalents and investments |
|
|
|
|
|
|
|
|
|
|
|
|
As of
|
|
As of
|
|
|
|
|
December 31,
|
|
June 30,
|
|
|
|
|
2013
|
|
2014
|
|
|
|
|
(in thousands)
|
|
|
Cash and cash equivalents:
|
|
|
|
|
|
|
Cash
|
|
$
|
89,176
|
|
$
|
51,648
|
|
|
Money market funds
|
|
98,437
|
|
91,195
|
|
|
Commercial paper
|
|
54,247
|
|
7,749
|
|
|
Corporate debt securities
|
|
3,895
|
|
7,256
|
|
|
Total cash and cash equivalents
|
|
$
|
245,755
|
|
$
|
157,848
|
|
|
Short-term investments:
|
|
|
|
|
|
|
Commercial paper
|
|
$
|
47,526
|
|
$
|
70,935
|
|
|
Corporate debt securities
|
|
50,436
|
|
95,494
|
|
|
U.S. government and government agency debt securities
|
|
700
|
|
—
|
|
|
Total short-term investments
|
|
$
|
98,662
|
|
$
|
166,429
|
|
|
Long-term investments:
|
|
|
|
|
|
|
Corporate debt securities
|
|
$
|
100,690
|
|
$
|
103,793
|
|
|
U.S. government and government agency debt securities
|
|
4,996
|
|
9,854
|
|
|
Total long-term investments
|
|
$
|
105,686
|
|
$
|
113,647
|
|
|
Cash, cash equivalents and investments
|
|
$
|
450,103
|
|
$
|
437,924
|
|
|
| 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 June 30, 2014
|
|
|
|
|
Adjusted
|
|
Unrealized
|
|
Unrealized
|
|
Fair
|
|
|
|
|
Cost
|
|
Gains
|
|
Losses
|
|
Value
|
|
|
|
|
(in thousands)
|
|
|
Money market funds
|
|
$
|
91,195
|
|
$
|
—
|
|
$
|
—
|
|
$
|
91,195
|
|
|
Commercial paper
|
|
78,684
|
|
—
|
|
—
|
|
78,684
|
|
|
Corporate debt securities
|
|
206,587
|
|
82
|
|
(126
|
)
|
206,543
|
|
|
U.S. government and government agency debt securities
|
|
9,866
|
|
—
|
|
(12
|
)
|
9,854
|
|
|
Total cash equivalents and marketable securities
|
|
$
|
386,332
|
|
$
|
82
|
|
$
|
(138
|
)
|
$
|
386,276
|
|
|
| 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 June 30, 2014
|
|
|
|
|
Adjusted
Cost
|
|
Fair Value
|
|
|
|
|
(in thousands)
|
|
|
Due in one year or less
|
|
$
|
271,638
|
|
$
|
271,600
|
|
|
Due after one year through three years
|
|
114,694
|
|
114,676
|
|
|
Total
|
|
$
|
386,332
|
|
$
|
386,276
|
|
|