Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

v3.7.0.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Taxes [Abstract]          
Discrete charge for an uncertain tax position $ 8 $ 433 $ 20 $ 433  
Discrete charge associated with disproportionate tax effect 102   $ 235    
Payments on tax audit liability $ 939        
Foreign statutory tax rate, foreign operations 25.00%   25.00%    
Gross deferred tax asset         $ 75,416
Valuation allowance         67,662
Net deferred tax asset         7,754
Deferred tax liabilities, gross         16,720
Net operating loss carryforwards for U.S. federal income tax purposes         172,419
Tax windfall         270
Research and experimentation credit carryforwards         3,407
Alternative minimum tax credit carryforwards         $ 315
AMT percentage         20.00%
Maximum percentage of income offset by available NOLs         90.00%
Net operating loss carryforwards, net of limitations         $ 172,149