Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Line Items]
Federal tax rate			21.00%	35.00%
Provisional tax expense		$ 13,000,000
Net deferred tax assets	$ 2,300,000
One-time mandatory repatriation tax			$ 1,200,000
Valuation allowance	6,720,000	6,870,000	6,720,000	$ 6,870,000
Deferred tax liability			1,100,000
Net tax impact			10,700,000
Refundable carry forward			1,100,000
Increase (decrease) to unrecognized tax interest			430,000	203,000
Unrecognized tax interest	9,500,000	9,100,000	9,500,000	9,100,000
Impact of effective tax rate if recognized	4,700,000	3,100,000	4,700,000	3,100,000
Alternative minimum tax credit carry-forwards	1,117,000	$ 939,000	1,117,000	$ 939,000
Domestic Tax Authority [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	11,700,000		11,700,000
United States [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	2,200,000		2,200,000
New Zealand [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	8,100,000		8,100,000
California [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	4,900,000		4,900,000
Hawaii [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	1,800,000		1,800,000
New York State [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	43,300,000		43,300,000
New York City [Member]
Income Tax Disclosure [Line Items]
Alternative minimum tax credit carry-forwards	43,300,000		43,300,000
Minimum [Member]
Income Tax Disclosure [Line Items]
Uncertain tax position probable changes in next 12 months	500,000		500,000
Maximum [Member]
Income Tax Disclosure [Line Items]
Uncertain tax position probable changes in next 12 months	$ 1,500,000		$ 1,500,000