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PARENT COMPANY FINANCIALS ONLY (Details 1) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Asset |  | $ 17,318,000 |  |  |  | $ 22,331,000 |  |  |  | $ 17,318,000 | $ 22,331,000 |
Income |  |  |  |  |  |  |  |  |  |  |  |
Dividends received from subsidiaries(1) |  |  |  |  |  |  |  |  |  | 46,900,000 | 44,500,000 |
Expenses |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  | 5,044,000 | $ 4,705,000 | $ 4,378,000 | $ 4,207,000 | 4,676,000 | $ 4,640,000 | $ 4,627,000 | $ 4,850,000 | 18,334,000 | 18,793,000 | $ 20,617,000
Income tax benefit |  | 14,915,000 | 12,681,000 | 10,731,000 | 9,014,000 | 7,698,000 | 9,793,000 | 9,508,000 | 8,428,000 | 47,341,000 | 35,427,000 | 27,218,000
Net Income |  | 22,064,000 | $ 23,852,000 | $ 20,563,000 | $ 20,725,000 | 17,179,000 | $ 20,484,000 | $ 20,374,000 | $ 18,611,000 | 87,204,000 | 76,648,000 | 64,960,000
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Dividend Income, Operating | [1] |  |  |  |  |  |  |  |  | 47,006,000 | 44,598,000 | 38,153,000
Derivative Asset | [2] | $ 1,535,000 |  |  |  | $ 1,364,000 |  |  |  | 1,535,000 | 1,364,000 |
Income |  |  |  |  |  |  |  |  |  |  |  |
Interest income(2) | [3] |  |  |  |  |  |  |  |  | 50,000 | 98,000 | 78,000
Total income |  |  |  |  |  |  |  |  |  | 47,056,000 | 44,696,000 | 38,231,000
Expenses |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | 3,995,000 | 5,901,000 | 5,769,000
Other expenses |  |  |  |  |  |  |  |  |  |  |  | 29,000
Total expenses |  |  |  |  |  |  |  |  |  | 3,995,000 | 5,901,000 | 5,798,000
Income before income taxes and equity in undistributed income of subsidiaries |  |  |  |  |  |  |  |  |  | 43,061,000 | 38,795,000 | 32,433,000
Income tax benefit |  |  |  |  |  |  |  |  |  | (1,523,000) | (1,791,000) | (2,301,000)
Income of parent company |  |  |  |  |  |  |  |  |  | 44,584,000 | 40,586,000 | 34,734,000
Equity in undistributed income of subsidiaries |  |  |  |  |  |  |  |  |  | 42,620,000 | 36,062,000 | 30,226,000
Net Income |  |  |  |  |  |  |  |  |  | 87,204,000 | 76,648,000 | 64,960,000
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income |  |  |  |  |  |  |  |  |  |  |  |
Dividends received from subsidiaries(1) |  |  |  |  |  |  |  |  |  | $ 67,000 | $ 62,000 | $ 55,000
[1] | Income of $67,000, $62,000 and $55,000 was not eliminated in consolidation for the years ended December 31, 2017, 2016, and 2015, respectively.
[2] | Entire balance eliminates in consolidation.
[3] | Entire balance eliminated in consolidation.

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