Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v3.10.0.1
Income Taxes (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]          
Provision for income tax benefit $ 1,940,000   $ 17,203,000 $ (3,069,000) $ 15,597,000
Effective income tax rate (53.40%)   198.00% 21.40% 650.40%
Statutory tax rate       21.00% 35.00%
Valuation Allowances and Reserves, Additions for Recoveries $ 1,300,000   $ 11,400,000    
Income tax provision related to one-time transition tax on mandatory deemed repatriation of foreign earnings   $ 16,600,000      
tax benefit related to unrecognized tax benefits due to the lapse of applicable statute of limitations       $ 405,000  
Minimum          
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]          
Possible of uncertain tax benefit within the next twelve months 0     0  
Maximum          
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]          
Possible of uncertain tax benefit within the next twelve months $ 3,900,000     $ 3,900,000