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Income Taxes (Income Tax Expense from Continuing Operations) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current      
Federal $ 12,448 $ 11,605 $ 9,814
State 780 511 396
Total Current 13,228 12,116 10,210
Deferred      
Federal (667) (3,078) (125)
State (63) 253 39
Foreign 107 (4) (20)
Total Deferred (623) (2,829) (106)
Income Tax Expense, Total $ 12,605 $ 9,287 $ 10,104