Income Taxes Company's uncertain tax positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Balance as of the beginning of the year	$ 9,066	$ 1,359
Tax positions related to current year:
Additions	152	147
Reductions	(14)	(18)
Tax positions related to prior years:
Additions	80	7,991
Reductions	(4)	(28)
Settlements	0	0
Lapses in statute of limitations	(64)	(385)
Balance as of the end of the year	9,216	9,066	$ 1,359
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	364
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	62
Unrecognized tax benfits, reduction in accrued interest and penalties	$ 12	$ 25	$ 35