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Note 21 - Condensed Financial Information (Parent Company Only) - Condensed Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Cash and cash equivalents | $ 285,659 | $ 252,262 |  |
Investment securities | 1,619,450 | 1,526,780 |  |
Loans | 5,596,604 | 4,888,004 |  |
Premises and equipment | 199,359 | 193,618 |  |
Other assets | 65,773 | 66,205 |  |
TOTAL ASSETS | 8,400,056 | 7,559,658 |  |
Long-term debt | 333,556 |  |  |
Total liabilities | 7,248,945 | 6,482,803 |  |
Preferred stock, 40,040,000 shares authorized; Series A, $0.01 par value, $1,000 liquidation value per share; 30,852 shares issued and outstanding at December 31, 2015 |  | 30,852 |  |
Common stock, Class A, $0.01 par value; 120,000,000 shares authorized; 31,277,723 and 30,278,432 shares issued and outstanding at December 31, 2016 and 2015, respectively | 313 | 303 |  |
Surplus | 711,976 | 662,378 |  |
Undivided profits | 454,034 | 385,987 |  |
Total stockholders’ equity | 1,151,111 | 1,076,855 | $ 494,319 | $ 403,832
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY | 8,400,056 | 7,559,658 |  |
Parent Company [Member] |  |  |  |
Cash and cash equivalents | 93,266 | 119,383 |  |
Investment securities | 79 | 2,049 |  |
Investments in wholly-owned subsidiaries | 1,141,294 | 1,051,842 |  |
Loans | 1,083 |  |  |
Intangible assets, net | 133 | 133 |  |
Premises and equipment | 11,534 | 5,338 |  |
Other assets | 27,955 | 28,245 |  |
TOTAL ASSETS | 1,275,344 | 1,206,990 |  |
Long-term debt | 108,326 | 112,870 |  |
Other liabilities | 15,907 | 17,265 |  |
Total liabilities | 124,233 | 130,135 |  |
Preferred stock, 40,040,000 shares authorized; Series A, $0.01 par value, $1,000 liquidation value per share; 30,852 shares issued and outstanding at December 31, 2015 |  | 30,852 |  |
Common stock, Class A, $0.01 par value; 120,000,000 shares authorized; 31,277,723 and 30,278,432 shares issued and outstanding at December 31, 2016 and 2015, respectively | 313 | 303 |  |
Surplus | 711,976 | 662,378 |  |
Undivided profits | 454,034 | 385,987 |  |
Unrealized depreciation on available-for-sale securities, net of income taxes of ($9,818) and ($1,720) at December 31, 2016 and 2015 respectively | (15,212) | (2,665) |  |
Total stockholders’ equity | 1,151,111 | 1,076,855 |  |
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY | $ 1,275,344 | $ 1,206,990 |  |

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- Definition Total debt and equity financial instruments including: (1) securities held-to-maturity and (2) securities available-for-sale; but excluding (3) trading securities. + References No definition available. + Details
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