|
Condensed Statements of Comprehensive Income (unaudited) (USD $)
In Thousands, unless otherwise specified
|
3 Months Ended |
|
Mar. 31, 2015
|
Mar. 31, 2014
|
| Condensed Statements of Comprehensive Income (unaudited) [Abstract] |
|
|
| Net income |
$ 45,585 |
$ 36,159 |
| Other comprehensive income (loss): |
|
|
| Foreign currency translation adjustments |
(4,421) |
745 |
| Income tax benefit (expense) |
7 |
(4) |
| Foreign currency translation adjustments, net of tax |
(4,414) |
741 |
| Unrealized gains on investments: |
|
|
| Unrealized gains arising during period |
67 |
152 |
| Less: reclassification adjustments for (losses) included in net income |
0 |
(1) |
| Changes in unrealized gains on investments |
67 |
153 |
| Income tax benefit (expense) |
44 |
(51) |
| Unrealized gains on investments, net of tax |
111 |
102 |
| Changes in employee benefit related items: |
|
|
| Amortization of prior service cost |
0 |
(458) |
| Recognized actuarial gain |
133 |
159 |
| Changes in employee benefit related items |
133 |
(299) |
| Income tax expense |
(23) |
(7) |
| Employee benefit related items, net of tax |
110 |
(306) |
| Other comprehensive (loss) income |
(4,193) |
537 |
| Comprehensive income |
$ 41,392 |
$ 36,696 |