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Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands | Total | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income/(Loss) [Member] | Treasury Stock at Cost [Member] | Parent [Member] | Non-controlling Interests [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of year at Dec. 31, 2015 |  |  |  |  | $ 10,426 | $ 1,820,772 | $ 805,685 | $ (39,533) | $ (104,934) |  |
Common stock issued under employee plans |  |  |  |  |  |  |  |  | 104,375 |  |
Common stock repurchased |  |  |  |  |  |  |  |  | (113,462) |  |
Common stock issued for acquisitions |  |  |  |  |  | (723) |  |  | 13,536 |  |
Unit amortization, net of forfeitures |  |  |  |  |  | 189,746 |  |  |  |  |
Net income |  | $ 81,520 |  |  |  |  | 81,520 |  |  |  |
Dividends declared, Preferred |  |  |  |  |  |  | (3,906) |  |  |  |
Common stock issued under employee plans and related tax benefits |  |  |  |  |  | (159,391) | (6,341) |  |  |  |
Tax deficit from stock-based compensation | [1] |  |  |  |  | (4,904) |  |  |  |  |
Issuance of preferred stock |  |  |  | $ 150,000 |  | (4,949) |  |  |  |  |
Unrealized gains/(losses) on securities, net of tax |  |  |  |  |  |  |  | 5,803 |  |  |
Unrealized gains/(losses) on cash flow hedging activities, net of tax |  |  |  |  |  |  |  | 7,288 |  |  |
Foreign currency translation adjustment, net of tax |  | (12,600) | [2],[3] |  |  |  |  | (12,600) |  |  |
Balance, end of year at Dec. 31, 2016 |  | 2,738,408 |  | 150,000 | 10,426 | 1,840,551 | 876,958 | (39,042) | (100,485) | $ 2,738,408 |
Common stock issued under employee plans |  |  |  |  | 292 |  |  |  | 74,175 |  |
Common stock repurchased |  | (13,000) |  |  |  |  |  |  | (12,998) |  |
Common stock issued for acquisitions |  |  |  |  | 28 | 9,324 |  |  |  |  |
Unit amortization, net of forfeitures |  |  |  |  |  | 167,908 |  |  |  |  |
Dividends declared to equity-award holders |  |  |  |  |  | 3,758 |  |  |  |  |
Net income |  | 182,871 |  |  |  |  | 182,871 |  |  |  |
Dividends declared, Common |  |  |  |  |  |  | (17,446) |  |  |  |
Dividends declared, Preferred |  |  |  |  |  |  | (9,375) |  |  |  |
Common stock issued under employee plans and related tax benefits |  |  |  |  |  | (288,152) |  |  |  |  |
Other |  |  |  |  |  | (41) | 518 |  |  |  |
Unrealized gains/(losses) on securities, net of tax |  |  |  |  |  |  |  | 4,730 |  |  |
Unrealized gains/(losses) on cash flow hedging activities, net of tax |  |  |  |  |  |  |  | (320) |  |  |
Foreign currency translation adjustment, net of tax |  | 7,896 | [2],[3] |  |  |  |  | 7,896 |  |  |
Balance, end of year at Dec. 31, 2017 |  | 2,861,576 |  | 150,000 | 10,746 | 1,733,348 | 1,033,526 | (26,736) | (39,308) | 2,861,576 |
Common stock issued under employee plans |  |  |  |  | 123 |  |  |  | 28,655 |  |
Common stock repurchased |  | (170,200) |  |  |  |  |  |  | (170,204) |  |
Common stock issued for acquisitions |  |  |  |  | 297 | 110,374 |  |  |  |  |
Unit amortization, net of forfeitures |  |  |  |  |  | 102,971 |  |  |  |  |
Dividends declared to equity-award holders |  |  |  |  |  | 6,812 |  |  |  |  |
Net income |  | 393,968 |  |  |  |  | 393,968 |  |  |  |
Dividends declared, Common |  |  |  |  |  |  | (41,450) |  |  |  |
Dividends declared, Preferred |  |  |  |  |  |  | (9,375) |  |  |  |
Common stock issued under employee plans and related tax benefits |  |  |  |  |  | (60,256) | (10,985) |  |  |  |
Other |  |  |  |  |  | 55 | 1,943 |  |  |  |
Unrealized gains/(losses) on securities, net of tax |  |  |  |  |  |  |  | (36,254) |  |  |
Unrealized gains/(losses) on cash flow hedging activities, net of tax |  |  |  |  |  |  |  | (792) |  |  |
Foreign currency translation adjustment, net of tax |  | (5,691) | [2],[3] |  |  |  |  | (5,691) |  |  |
Balance, end of year at Dec. 31, 2018 |  | $ 3,197,593 |  | $ 150,000 | $ 11,166 | $ 1,893,304 | 1,366,503 | (72,523) | $ (180,857) | $ 3,167,593 | $ 30,000
Non-controlling interests |  |  |  |  |  |  |  |  |  |  | $ 30,000
Cumulative effect of adoption of ASU | ASU 2014-09 [Member] |  |  |  |  |  |  | (4,174) |  |  |  |
Cumulative effect of adoption of ASU | ASU 2018-02 [Member] |  |  |  |  |  |  | $ 3,050 | $ (3,050) |  |  |
[1] | During the year ended December 31, 2017, we adopted new stock-based compensation guidance. See Note 2 of the Notes to Consolidated Financial Statements for additional information.
[2] | Net of a tax benefit of $11.2 million and tax expenses of $3.3 million and $0.3 million for the years ended December 31, 2018, 2017, and 2016, respectively.
[3] | The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio risk. The reclassification is reflected in the activity for the year ended December 31, 2018. See Note 2 for further details.

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