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Consolidated Statements of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified | Total | Class A Common Stock | Class B Common Stock | Common Stock Class A Common Stock | Common Stock Class B Common Stock | Surplus | Surplus Class A Common Stock | Surplus Class B Common Stock | Retained Earnings | Retained Earnings Class A Common Stock | Retained Earnings Class B Common Stock | Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Class A Common Stock | Accumulated Other Comprehensive Loss Class B Common Stock
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Beginning balance at Dec. 31, 2010 | $ 1,732,962 |  |  | $ 8,757 | $ 1,678 | $ 143,766 |  |  | $ 1,615,290 |  |  | $ (36,529) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 195,028 |  |  | 0 | 0 | 0 |  |  | 195,028 |  |  | 0 |  |
Net current period other comprehensive income | (30,045) |  |  | 0 | 0 | 0 |  |  | 0 |  |  | (30,045) |  |
Repurchase of common stock shares |  | (16,785) | (7,602) | (113) | (38) |  | 0 | 0 |  | (16,672) | (7,564) |  | 0 | 0
Cash dividends | (12,430) |  |  | 0 | 0 | 0 |  |  | (12,430) |  |  | 0 |  |
Ending balance at Dec. 31, 2011 | 1,861,128 |  |  | 8,644 | 1,640 | 143,766 |  |  | 1,773,652 |  |  | (66,574) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 134,348 |  |  | 0 | 0 | 0 |  |  | 134,348 |  |  | 0 |  |
Net current period other comprehensive income | (15,532) |  |  | 0 | 0 | 0 |  |  | 0 |  |  | (15,532) |  |
Repurchase of common stock shares |  | (9,131) | (94,493) | (56) | (607) |  | 0 | 0 |  | (9,075) | (93,886) |  | 0 | 0
Cash dividends | (12,313) |  |  | 0 | 0 | 0 |  |  | (12,313) |  |  | 0 |  |
Ending balance at Dec. 31, 2012 | 1,864,007 |  |  | 8,588 | 1,033 | 143,766 |  |  | 1,792,726 |  |  | (82,106) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 167,699 |  |  | 0 | 0 | 0 |  |  | 167,699 |  |  | 0 |  |
Net current period other comprehensive income | 56,838 |  |  | 0 | 0 | 0 |  |  | 0 |  |  | 56,838 |  |
Repurchase of common stock shares |  | (321) |  | (2) |  |  | 0 |  |  | (319) |  |  | 0 |
Cash dividends | (11,548) |  |  | 0 | 0 | 0 |  |  | (11,548) |  |  | 0 |  |
Ending balance at Dec. 31, 2013 | $ 2,076,675 |  |  | $ 8,586 | $ 1,033 | $ 143,766 |  |  | $ 1,948,558 |  |  | $ (25,268) |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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