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Note Q - Parent Company Only Condensed Financial Information - Condensed Statements of Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Gain on sale of ProAlliance Corporation                         $ 810
Interest on subordinated debentures                         204 170 165
Income before income taxes and equity in undistributed earnings of subsidiaries..                         8,840 11,383 11,193
Income tax benefit                         1,920 2,809 3,120
Net income $ 2,024 $ 358 $ 1,706 $ 2,832 $ 1,898 $ 1,642 $ 1,410 $ 3,624 $ 423 $ 2,742 $ 1,344 $ 3,564 6,920 8,574 8,073
Parent Company [Member]                              
Interest on notes                         52 53 84
Other operating income                         34
Dividends from subsidiaries                         6,900 3,500 3,500
Gain on sale of ProAlliance Corporation                         810
Interest on notes                         136 53 84
Interest on subordinated debentures                         204 170 165
Operating expenses                         667 345 384
Income before income taxes and equity in undistributed earnings of subsidiaries..                         5,945 2,985 3,795
Income tax benefit                         256 167 (108)
Equity in undistributed earnings of subsidiaries                         719 5,422 4,386
Net income                         $ 6,920 $ 8,574 $ 8,073