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Current Accounting Developments (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jan. 01, 2019 | Jan. 01, 2018 | [2]
--- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating lease right-of-use assets | $ 109,032 |  |  |
Operating lease liabilities | $ 117,448 |  |  |
Cumulative effect of a change in accounting principle |  | $ 14,668 | [1] | $ (160)
Retained Earnings |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cumulative effect of a change in accounting principle |  | 14,668 | [1] | $ (545)
ASU 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating lease right-of-use assets |  | 109,100 |  |
Operating lease liabilities |  | 117,700 |  |
ASU 2016-02 | Retained Earnings |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cumulative effect of a change in accounting principle |  | $ 14,700 |  |
[1] | Represents the impact of the adoption of ASU 2016-02, Leases (Topic 842) and subsequent related ASUs in the first quarter of 2019. Refer to Note 2 — Current Accounting Developments and Note 11 — Leases to the Consolidated Financial Statements in this Form 10-Q for additional information.
[2] |
|  | Common Stock and Additional Paid-in Capital |  | Retained Earnings |  | Treasury Stock |  | AOCI, Net of Tax |  | Total Stockholders’ Equity
|  | Shares |  | Amount |  |  |  |
BALANCE, JANUARY 1, 2018 |  | 144,543,060 |  |  | $ | 1,755,495 |  |  | $ | 2,576,302 |  |  | $ | (452,327 | ) |  | $ | (37,519 | ) |  | $ | 3,841,951 |
Cumulative effect of change in accounting principle related to marketable equity securities (1) |  | — |  |  | — |  |  | (545 | ) |  | — |  |  | 385 |  |  | (160 | )
Reclassification of tax effects in AOCI resulting from the new federal corporate income tax rate (2) |  | — |  |  | — |  |  | 6,656 |  |  | — |  |  | (6,656 | ) |  | — |
Net income |  | — |  |  | — |  |  | 359,381 |  |  | — |  |  | — |  |  | 359,381 |
Other comprehensive loss |  | — |  |  | — |  |  | — |  |  | — |  |  | (27,677 | ) |  | (27,677 | )
Net activity of common stock pursuant to various stock compensation plans and agreements |  | 361,569 |  |  | 14,543 |  |  | — |  |  | (15,161 | ) |  | — |  |  | (618 | )
Cash dividends on common stock ($0.40 per share) |  | — |  |  | — |  |  | (58,593 | ) |  | — |  |  | — |  |  | (58,593 | )
BALANCE, JUNE 30, 2018 |  | 144,904,629 |  |  | $ | 1,770,038 |  |  | $ | 2,883,201 |  |  | $ | (467,488 | ) |  | $ | (71,467 | ) |  | $ | 4,114,284 |
BALANCE, JANUARY 1, 2019 |  | 144,961,363 |  |  | $ | 1,789,977 |  |  | $ | 3,160,132 |  |  | $ | (467,961 | ) |  | $ | (58,174 | ) |  | $ | 4,423,974 |
Cumulative effect of change in accounting principle related to leases (3) |  | — |  |  | — |  |  | 14,668 |  |  | — |  |  | — |  |  | 14,668 |
Net income |  | — |  |  | — |  |  | 314,404 |  |  | — |  |  | — |  |  | 314,404 |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | 48,202 |  |  | 48,202 |
Warrants exercised |  | 180,226 |  |  | 1,711 |  |  | — |  |  | 2,732 |  |  | — |  |  | 4,443 |
Net activity of common stock pursuant to various stock compensation plans and agreements |  | 404,980 |  |  | 17,374 |  |  | — |  |  | (14,169 | ) |  | — |  |  | 3,205 |
Cash dividends on common stock ($0.505 per share) |  | — |  |  | — |  |  | (74,303 | ) |  | — |  |  | — |  |  | (74,303 | )
BALANCE, JUNE 30, 2019 |  | 145,546,569 |  |  | $ | 1,809,062 |  |  | $ | 3,414,901 |  |  | $ | (479,398 | ) |  | $ | (9,972 | ) |  | $ | 4,734,593 |

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