XML 82 R68.htm IDEA: XBRL DOCUMENT v3.3.1.900
Income Taxes - Valuation allowance for deferred tax assets (Details) - Deferred income tax asset valuation allowance: - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation allowance for deferred tax assets [Roll Forward]      
Balance Beginning of Year $ 1,274 $ 1,213 $ 1,334
Charged to costs and expense (313) 158  
Charged to other accounts 91 (83)  
Deductions 0 (14) (289)
Balance End of Year $ 1,052 $ 1,274 $ 1,213