Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
U.S federal income tax rate		35.00%	35.00%	35.00%
U.S. Tax Cuts and Jobs Act of 2017, federal tax rate		21.00%
Net tax benefit from U.S. Tax Cuts and Job Act		$ 16,900
Effective tax rate favorably affected by U.S. Tax Cuts and Job Act		29.60%
Undistributed foreign earnings		$ 28,300
Income taxes if foreign earnings repatriated		$ 200
Minimum percentage realization for recognition of income tax position		50.00%
Unrecognized tax benefits		$ 277	$ 266	$ 220
Unrecognized tax benefits, if recognized, would reduce the Company’s effective tax rate		300
Accrued potential interest and penalties related to unrecognized tax benefits		100	$ 100
Scenario, Plan [Member]
Income Taxes [Line Items]
U.S federal income tax rate	21.00%
Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards		$ 136,900
Operating loss carryforwards, expiration date		Dec. 31, 2035
Foreign [Member]
Income Taxes [Line Items]
Operating loss carryforwards		$ 33,200
Operating loss carryforwards, expiration date		Dec. 31, 2017
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards		$ 93,200
Operating loss carryforwards, expiration date		Dec. 31, 2029
Earliest Tax Year [Member] | Federal [Member]
Income Taxes [Line Items]
Tax years subject to examinations by tax authorities		2014
Earliest Tax Year [Member] | State [Member]
Income Taxes [Line Items]
Tax years subject to examinations by tax authorities		2013
Earliest Tax Year [Member] | Barbados Revenue Authority [Member]
Income Taxes [Line Items]
Tax years subject to examinations by tax authorities		2008
Latest Tax Year [Member] | Federal [Member]
Income Taxes [Line Items]
Tax years subject to examinations by tax authorities		2016
Latest Tax Year [Member] | State [Member]
Income Taxes [Line Items]
Tax years subject to examinations by tax authorities		2016
Latest Tax Year [Member] | Barbados Revenue Authority [Member]
Income Taxes [Line Items]
Tax years subject to examinations by tax authorities		2016
Accounting Standards Update 2016-09 [Member]
Income Taxes [Line Items]
Deferred tax asset		$ 1,000