Income Taxes (Narrative) (Details) - USD ($)	1 Months Ended		12 Months Ended
	Dec. 31, 2017		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Income Tax Disclosure [Line Items]
Federal tax rate				35.00%
Provisional tax expense				$ 13,000,000
Net deferred tax assets				8,300,000
One-time mandatory repatriation tax				4,700,000
Valuation allowance	$ 6,870,000	[1]		6,870,000	[1]	$ 10,593,000
Alternative minimum tax carry forwards	939,000	[1]		939,000	[1]	1,690,000
Increase (decrease) to unrecognized tax interest				203,000		400,000
Unrecognized tax interest	9,100,000			9,100,000		8,900,000
Impact of effective tax rate if recognized	3,100,000			3,100,000		9,900,000
Uncertain tax position probable changes in next 12 months	1,500,000			1,500,000		$ 500,000
Advanced to Overseas Subsidiary				(7,620,000)
Puerto Rico Subsidiary [Member]
Income Tax Disclosure [Line Items]
Reversed withholding tax reserve	7,800,000
Scenario, Actual [Member]
Income Tax Disclosure [Line Items]
Federal tax rate			21.00%
United States [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax carry forwards	939,000			939,000
New Zealand [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax carry forwards	8,400,000			8,400,000
New York State [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax carry forwards	43,700,000			43,700,000
New York City [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax carry forwards	$ 43,800,000			$ 43,800,000

[1] We recorded an adjustment to our federal deferred income tax assets and liabilities as of December 31, 2017 to reflect the reduction in the U.S. statutory federal corporate income tax rate from 35% to 21% resulting from the Tax Act.