Annual report pursuant to Section 13 and 15(d)

Income Taxes - Balances in Uncertain Tax Positions (Details)

v3.8.0.1
Income Taxes - Balances in Uncertain Tax Positions (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]    
Balance, beginning and end of period $ 9,482 $ 9,482