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Consolidated Statements Of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement of Comprehensive Income [Abstract]      
Net income $ 21,859 $ 25,701 $ 19,515
Other comprehensive (loss) income, before tax:      
Amortization of unrecognized loss 0 9 9
Accumulated postretirement expense (benefit) obligation adjustment 46 70 (1)
Unrealized (losses) gains on investments arising during the period (1,900) 7,478 1,146
Reclassification adjustment for sale of securities included in net income 117 (1,227) (973)
Reclassification adjustment for write-down of securities included in net income 0 26 234
Other comprehensive (loss) income, before tax (1,737) 6,356 415
Income tax expense related to postretirement health benefits 9 27 3
Income tax (benefit) expense related to unrealized (losses) gains on investments arising during the year (401) 2,556 388
Income tax expense (benefit) related to reclassification adjustment for sale of securities included in net income 24 (419) (334)
Income tax expense related to reclassification adjustment for write-down of securities included in net income 0 8 80
Net income tax (benefit) expense on other comprehensive (loss) income (368) 2,172 137
Other comprehensive (loss) income (1,369) 4,184 278
Comprehensive Income 20,490 29,885 19,793
Comprehensive loss attributable to noncontrolling interests 33 6 8
Comprehensive Income Attributable to the Company $ 20,523 $ 29,891 $ 19,801