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Condensed Financial Information - Parent Company Only Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Cash Flows From Operating Activities: |  |  |
Net Income | $ 149,502 | $ 157,894 | $ 161,840
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract] |  |  |
Stock-based compensation | 5,938 | 5,865 | 5,330
Excess tax benefits from stock-based compensation | (201) | (81) | (302)
Decrease (increase) in other assets | (9,931) | (8,803) | 37,236
Loss on redemption of trust preferred securities | 5,626 | 0 | 0
Increase in other liabilities and payable to non-bank subsidiaries | (8,128) | (13,294) | (29,344)
Total adjustments | 27,460 | 52,478 | 139,777
Net cash provided by operating activities | 176,962 | 210,372 | 301,617
Cash Flows From Investing Activities |  |  |
Net cash used in investing activities | (818,027) | (275,448) | (598,747)
Cash Flows From Financing Activities: |  |  |
Repayments of long-term debt | (539,497) | (6,284) | (10,669)
Additions to long-term debt | 347,778 | 262,113 | 0
Net proceeds from issuance of common stock | 10,607 | 8,201 | 9,936
Excess tax benefits from stock-based compensation | 201 | 81 | 302
Dividends paid | (65,361) | (64,028) | (46,525)
Acquisition of treasury stock | (50,000) | (175,255) | (90,927)
Deferred accelerated stock repurchase payment | 0 | (20,000) | 0
Deferred accelerated stock repurchase payment | 50,000 | 175,255 | 90,927
Net cash provided by (used in) financing activities | 636,483 | (47,762) | 259,370
Net (Decrease) Increase in Cash and Cash Equivalents | (4,582) | (112,838) | (37,760)
Parent |  |  |
Cash Flows From Operating Activities: |  |  |
Net Income | 149,502 | 157,894 | 161,840
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract] |  |  |
Stock-based compensation | 5,938 | 5,865 | 5,330
Excess tax benefits from stock-based compensation | (201) | (81) | (302)
Decrease (increase) in other assets | 2,806 | (7,120) | 1,893
Equity in undistributed net income of subsidiaries | (58,884) | (39,895) | (68,525)
Loss on redemption of trust preferred securities | 5,626 | 0 | 0
Increase in other liabilities and payable to non-bank subsidiaries | 106,490 | 37,354 | 26,946
Total adjustments | 61,775 | (3,877) | (34,658)
Net cash provided by operating activities | 211,277 | 154,017 | 127,182
Cash Flows From Financing Activities: |  |  |
Repayments of long-term debt | (254,640) | 0 | 0
Additions to long-term debt | 147,779 | 97,113 | 0
Net proceeds from issuance of common stock | 10,607 | 8,201 | 9,936
Excess tax benefits from stock-based compensation | 201 | 81 | 302
Dividends paid | (65,361) | (64,028) | (46,525)
Acquisition of treasury stock | (50,000) | (175,255) | (90,927)
Deferred accelerated stock repurchase payment | 0 | (20,000) | 0
Net cash provided by (used in) financing activities | (211,414) | (153,888) | (127,214)
Net (Decrease) Increase in Cash and Cash Equivalents | (137) | 129 | (32)
Cash and Cash Equivalents at Beginning of Year | 137 | 8 | 40
Cash and Cash Equivalents at End of Year | $ 0 | $ 137 | $ 8

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