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Parent Company Cash Flow Statement (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ 47,477 | $ 51,845 | $ 30,628 | $ 35,225 | $ 29,934 | $ 33,015 | $ 31,118 | $ 27,555 | $ 165,175 | $ 121,622 | $ 87,204
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  |
Deferred income tax expense |  |  |  |  |  |  |  |  |  | 10,594 | (4,497) | 9,211
Change in other liabilities |  |  |  |  |  |  |  |  |  | 19,283 | 7,100 | (3,825)
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  | 216,522 | 141,837 | 130,909
Cash flows provided by (used) in investing activities |  |  |  |  |  |  |  |  |  |  |  |
Net cash used in investing activities |  |  |  |  |  |  |  |  |  | 20,160 | (387,511) | (316,769)
Cash flows provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Lines of Credit |  |  |  |  |  |  |  |  |  | 49,980 | 0 | 0
Repayments of Lines of Credit |  |  |  |  |  |  |  |  |  | (49,980) | 0 | 0
Proceeds from Debt, Net of Issuance Costs |  |  |  |  |  |  |  |  |  | 74,867 | 0 | 0
Proceeds from Issuance of Subordinated Long-term Debt |  |  |  |  |  |  |  |  |  | 49,526 | 0 | 0
Repayments of Subordinated Debt |  |  |  |  |  |  |  |  |  | 34,767 | 0 | 0
Restricted stock awards issued, net of awards surrendered |  |  |  |  |  |  |  |  |  | (1,463) | (1,371) | (1,422)
Cash received from stock option exercises |  |  |  |  |  |  |  |  |  | 281 | 184 | 214
Proceeds from shares issued under the direct stock purchase plan |  |  |  |  |  |  |  |  |  | 4,951 | 2,712 | 1,636
Common dividends paid |  |  |  |  |  |  |  |  |  | (53,274) | (40,167) | (34,045)
Net cash provided by financing activities |  |  |  |  |  |  |  |  |  | (336,163) | 283,013 | 109,881
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  |  | (99,481) | 37,339 | (75,979)
Cash and cash equivalents at beginning of year |  |  |  |  | 250,455 |  |  |  | 213,116 | 250,455 | 213,116 | 289,095
Cash and cash equivalents at end of period |  | 150,974 |  |  |  | 250,455 |  |  |  | 150,974 | 250,455 | 213,116
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Investments in subsidiaries | [1] | 1,743,435 |  |  |  | 1,128,407 |  |  |  | 1,743,435 | 1,128,407 |
Net income |  |  |  |  |  |  |  |  |  | 165,175 | 121,622 | 87,204
Adjustments to reconcile net income to net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  | 157 | 54 | 12
Deferred income tax expense |  |  |  |  |  |  |  |  |  | 1,021 | 49 | 51
Change in prepaid income taxes and other assets |  |  |  |  |  |  |  |  |  | 20,556 | 135 | (99)
Change in other liabilities |  |  |  |  |  |  |  |  |  | (4,613) | 6 | (562)
Deficit (equity) in undistributed income of subsidiaries |  |  |  |  |  |  |  |  |  | 10,641 | (53,450) | (42,620)
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  | 192,937 | 68,416 | 43,986
Cash flows provided by (used) in investing activities |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for acquisitions, net of cash acquired (1) | [2] |  |  |  |  |  |  |  |  | (148,297) | (13,649) | (4,834)
Net cash used in investing activities |  |  |  |  |  |  |  |  |  | (148,297) | (13,649) | (4,834)
Cash flows provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Lines of Credit |  |  |  |  |  |  |  |  |  | 49,980 | 0 | 0
Repayments of Lines of Credit |  |  |  |  |  |  |  |  |  | (49,980) | 0 | 0
Proceeds from Debt, Net of Issuance Costs |  |  |  |  |  |  |  |  |  | 74,867 | 0 | 0
Proceeds from Issuance of Subordinated Long-term Debt |  |  |  |  |  |  |  |  |  | 49,526 | 0 | 0
Restricted stock awards issued, net of awards surrendered |  |  |  |  |  |  |  |  |  | (1,463) | (1,371) | (1,422)
Cash received from stock option exercises |  |  |  |  |  |  |  |  |  | 281 | 184 | 214
Proceeds from shares issued under the direct stock purchase plan |  |  |  |  |  |  |  |  |  | 4,951 | 2,712 | 1,636
Common dividends paid |  |  |  |  |  |  |  |  |  | (53,274) | (40,167) | (34,045)
Net cash provided by financing activities |  |  |  |  |  |  |  |  |  | 26,792 | (38,642) | (33,617)
Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  |  | 71,432 | 16,125 | 5,535
Cash and cash equivalents at beginning of year |  |  |  |  | $ 64,256 |  |  |  | $ 48,131 | 64,256 | 48,131 | 42,596
Cash and cash equivalents at end of period |  | 135,688 |  |  |  | 64,256 |  |  |  | 135,688 | 64,256 | 48,131
Cash | [3] | $ 135,688 |  |  |  | $ 64,256 |  |  |  | 135,688 | 64,256 |
Junior Subordinated Debt [Member] | Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Cash flows provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Subordinated Debt |  |  |  |  |  |  |  |  |  | (13,329) | 0 | 0
Subordinated Debt [Member] | Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Cash flows provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Subordinated Debt |  |  |  |  |  |  |  |  |  | $ (34,767) | $ 0 | $ 0
[1] | Majority of balance eliminates in consolidation
[2] | The majority of the net assets acquired at the parent company represented each of the acquired companies' investments in their wholly owned subsidiaries, which were eliminated in consolidation at December 31, 2019, 2018, and 2017, respectively.
[3] | Entire balance eliminates in consolidation.

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- Definition The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Details
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- Details
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- Details
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