Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
|
| Statement Of Income And Comprehensive Income [Abstract] | ||
| Net income | $ 52,672 | $ 37,796 |
| Other comprehensive income (loss), net of tax: | ||
| Unrealized gains on securities | 31,827 | 20,073 |
| Foreign currency translation adjustment | 12,104 | (18,660) |
| Pension benefit adjustment | 3,596 | 4,600 |
| Total other comprehensive income (loss), net of tax | 47,527 | 6,013 |
| Comprehensive income | 100,199 | 43,809 |
| Less: Comprehensive income attributable to noncontrolling interests | 217 | 162 |
| Comprehensive income attributable to the Company | $ 99,982 | $ 43,647 |