Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Income Taxes [Line Items]
Reconciliation of provision for income taxes on continuing operations at the statutory U.S. Federal tax rate	35.00%
Valuation allowance recognized	$ 246,500,000	$ 233,700,000
Net change in valuation allowance	12,800,000	57,900,000
Valuation allowance relating to federal carryover	2,000,000
Valuation allowance relating to state tax credit carryover		400,000
Net federal operating tax loss carry-forward	1,200,000,000
Net operating tax loss carried forward from stock options	185,500,000
Operating loss carry-forward, expiration year	2014
Foreign net operating loss carry-forward	36,300,000
Net state operating tax loss carry-forward	594,800,000
Deferred (benefit) provision for taxes, Foreign tax	(9,013,000)	(1,000)	(1,104,000)
Undistributed earnings of Company's foreign subsidiaries	9,800,000
Undistributed earnings of foreign subsidiaries, federal and state income taxes	0
Minimum [Member]
Schedule Of Income Taxes [Line Items]
Tax credit carry-forward, expiration year	2017
Operating loss carry-forward, expiration year	2019
Maximum [Member]
Schedule Of Income Taxes [Line Items]
Operating loss carry-forward, expiration year	2033
Guatemala [Member] | Foreign Tax Authority [Member]
Schedule Of Income Taxes [Line Items]
Deferred (benefit) provision for taxes, Foreign tax	(3,600,000)
Nicaragua [Member] | Foreign Tax Authority [Member]
Schedule Of Income Taxes [Line Items]
Deferred (benefit) provision for taxes, Foreign tax	$ (1,400,000)