Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax [Line Items]
Corporate tax rate	21.00%	35.00%
Additional tax benefit	$ 3,000
Net operating loss carryforward	308,100
Valuation allowance decrease	300
Deferred tax assets, net	112,008	$ 105,152
Unrecognized tax benefits	312	3,180	$ 1,800	$ 2,717
Unrecognized tax benefits, accrued interest and penalties	100	500
Accounts Payable and Accrued Expenses [Member]
Income Tax [Line Items]
Current taxes payable	8,400	4,200
Other Assets [Member]
Income Tax [Line Items]
Current taxes receivable	$ 0	$ 54,300