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Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Stockholders' Equity Attributable to Parent | $ 1,682,324 | $ 998,305 | $ 1,682,324 | $ 998,305 | $ 1,636,003 | $ 1,073,490 | $ 977,065 | $ 943,809
Held In Rabbi Trust At Cost [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | $ (4,713) | $ (4,784) | $ (4,713) | $ (4,784) | (4,648) | (4,718) | (4,653) | (4,590)
Retained Earnings |  |  |  |  |  |  |  |
Cash dividends declared per common share (in dollars per share) | $ 0.44 | $ 0.38 | $ 1.32 | $ 1.14 |  |  |  |
Stockholders' Equity Attributable to Parent | $ 621,831 | $ 527,473 | $ 621,831 | $ 527,473 | 585,111 | 546,736 | 504,926 | 465,937
Deferred Compensation, Share-based Payments [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 4,713 | 4,784 | 4,713 | 4,784 | 4,648 | 4,718 | 4,653 | 4,590
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 26,202 | (12,664) | 26,202 | (12,664) | 20,956 | (1,173) | (10,114) | (1,831)
Common Stock [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | 342 | 274 | 342 | 274 | 342 | 279 | 274 | 273
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | $ 1,033,949 | $ 483,222 | $ 1,033,949 | $ 483,222 | $ 1,029,594 | $ 527,648 | $ 481,979 | $ 479,430
Common Class A [Member] |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | 34,366,781 | 27,540,843 | 34,366,781 | 27,540,843 | 34,321,061 | 28,080,408 | 27,532,524 | 27,450,190

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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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