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Income Tax Expense from Continuing Operations (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current      
Federal $ 9,814,000 $ 10,282,000 $ 11,682,000
State 396,000 96,000 (202,000)
Total Current 10,210,000 10,378,000 11,480,000
Deferred      
Federal (125,000) 176,000 365,000
State 39,000 206,000 63,000
Foreign (20,000) (96,000) 0
Total Deferred (106,000) 286,000 428,000
Income Tax Expense, Total $ 10,104,000 $ 10,664,000 $ 11,908,000