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Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income before income taxes:      
Domestic $ 31,748 $ 40,420 $ 17,305
Foreign 11,070 14,381 7,267
Income before income taxes 42,818 54,801 24,572
Current income tax expense:      
Domestic 3,556 14,487 4,325
Foreign 2,736 3,457 2,205
Total current 6,292 17,944 6,530
Deferred income tax expense (benefit):      
Domestic 4,960 (4,383) (2,686)
Foreign 1,016 (553) 319
Valuation allowance (1,608) (338) 197
Total deferred 4,368 (5,274) (2,170)
Total income tax expense $ 10,660 $ 12,670 $ 4,360