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Parent Company Financial Information (Statements of Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Dividend income: |  |  |
Other income/(loss) | $ 44,885 | $ 64,231 | $ 60,730
Interest expense: |  |  |
Short-term debt | 16,000 | 4,736 | 3,172
Interest on term borrowings | 36,037 | 29,103 | 38,387
Total interest expense | 147,616 | 88,825 | 82,685
Compensation, employee benefits and other expense | 589,411 | 562,948 | 511,633
Income/(loss) before income taxes | 308,872 | 345,321 | 108,254
Tax expense/(benefit) | 131,892 | 106,810 | 10,941
Equity in undistributed net income/(loss) of subsidiaries: |  |  |
Net income/(loss) attributable to controlling interest | 165,515 | 227,046 | 85,879
Parent Company |  |  |
Dividend income: |  |  |
Bank | 250,000 | 250,000 | 325,000
Non-bank | 1,097 | 1,361 | 1,150
Total dividend income | 251,097 | 251,361 | 326,150
Interest income | 0 | 0 | 0
Other income/(loss) | 190 | (207) | 5,884
Total income | 251,287 | 251,154 | 332,034
Interest expense: |  |  |
Short-term debt | 0 | 0 | 6
Interest on term borrowings | 17,936 | 14,238 | 23,579
Total interest expense | 17,936 | 14,238 | 23,585
Compensation, employee benefits and other expense | 43,783 | 38,926 | 36,388
Total expense | 61,719 | 53,164 | 59,973
Income/(loss) before income taxes | 189,568 | 197,990 | 272,061
Tax expense/(benefit) | 512 | (22,981) | (21,757)
Income/(loss) before equity in undistributed net income of subsidiaries | 189,056 | 220,971 | 293,818
Equity in undistributed net income/(loss) of subsidiaries: |  |  |
Bank | (24,255) | 9,508 | (207,831)
Non-bank | 714 | (3,433) | (108)
Net income/(loss) attributable to controlling interest | $ 165,515 | $ 227,046 | $ 85,879

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