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Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock Class A Common Stock | Common Stock Class B Common Stock | Surplus | Retained Earnings | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2013 | $ 2,071,462 | $ 8,586 | $ 1,033 | $ 143,766 | $ 1,943,345 | $ (25,268)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 75,666 | 0 | 0 | 0 | 75,666 | 0
Net current period other comprehensive income | 23,410 | 0 | 0 | 0 | 0 | 23,410
Cash dividends | (8,657) | 0 | 0 | 0 | (8,657) | 0
Ending balance at Sep. 30, 2014 | 2,161,881 | 8,586 | 1,033 | 143,766 | 2,010,354 | (1,858)
Beginning balance at Dec. 31, 2014 | 2,687,594 | 11,005 | 1,005 | 658,918 | 2,069,647 | (52,981)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 167,638 | 0 | 0 | 0 |  | 0
Net current period other comprehensive income | 18,105 | 0 | 0 | 0 | 0 | 18,105
Cash dividends | (10,809) | 0 | 0 | 0 | (10,809) | 0
Ending balance at Sep. 30, 2015 | $ 2,862,528 | $ 11,005 | $ 1,005 | $ 658,918 | $ 2,226,476 | $ (34,876)

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