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Parent Company Financial Information (Condensed Statements of Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | [1] | Sep. 30, 2017 | [2] | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income |  |  |  |  |  |  |  |  |  |  |
Deposits in banks |  |  |  |  |  |  |  |  | $ 702 | $ 813 | $ 216
Expense |  |  |  |  |  |  |  |  |  |  |
Compensation and employee benefits |  |  |  |  |  |  |  |  | 200,199 | 169,674 | 150,282
Interest Expense, Subordinated Notes and Debentures |  |  |  |  |  |  |  |  | 1,871 | 304 | 0
Other borrowings |  |  |  |  |  |  |  |  | 504 | 575 | 545
Other expense |  |  |  |  |  |  |  |  | 36,627 | 34,161 | 28,362
Income before income tax benefit and equity in undistributed (excess distributed) earnings of subsidiaries | $ 55,482 | $ 57,821 | $ 51,748 | $ 46,785 | $ 40,851 | $ 59,107 | $ 38,252 | $ 39,773 | 211,836 | 177,983 | 149,781
Provision for income taxes | 10,734 | 11,406 | 9,999 | 6,815 | 25,123 | 18,338 | 11,120 | 10,574 | 38,954 | 65,155 | 44,915
Net income | $ 44,748 | $ 46,415 | $ 41,749 | $ 39,970 | $ 15,728 | $ 40,769 | $ 27,132 | $ 29,199 | 172,882 | 112,828 | 104,866
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Income |  |  |  |  |  |  |  |  |  |  |
Dividend from banking subsidiaries |  |  |  |  |  |  |  |  | 85,250 | 66,800 | 83,500
Deposits in banks |  |  |  |  |  |  |  |  | 12 | 2 | 4
Other income |  |  |  |  |  |  |  |  | 56 | 8 | 8
Total Income |  |  |  |  |  |  |  |  | 85,318 | 66,810 | 83,512
Expense |  |  |  |  |  |  |  |  |  |  |
Compensation and employee benefits |  |  |  |  |  |  |  |  | 978 | 732 | 543
Interest Expense, Subordinated Notes and Debentures |  |  |  |  |  |  |  |  | 1,871 | 304 | 0
Other borrowings |  |  |  |  |  |  |  |  | 4 | 60 | 0
Other expense |  |  |  |  |  |  |  |  | 2,058 | 3,090 | 1,608
Total Expenses |  |  |  |  |  |  |  |  | 4,911 | 4,186 | 2,151
Income before income tax benefit and equity in undistributed (excess distributed) earnings of subsidiaries |  |  |  |  |  |  |  |  | 80,407 | 62,624 | 81,361
Provision for income taxes |  |  |  |  |  |  |  |  | (1,017) | (548) | (748)
Income before equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 81,424 | 63,172 | 82,109
Equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 91,458 | 49,656 | 22,757
Net income |  |  |  |  |  |  |  |  | $ 172,882 | $ 112,828 | $ 104,866
[1] | During the fourth quarter of 2017, Columbia acquired Pacific Continental and also recorded a charge through provision for income taxes related to the re-measurement of our deferred tax assets pursuant to the newly enacted Tax Cuts and Jobs Act. See Note 2, “Business Combinations,” for further information regarding this acquisition. See Note 23, “Income Tax,” for further information regarding the re-measurement of our deferred tax assets.
[2] | During the third quarter of 2017, Columbia sold its merchant card services portfolio.

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