Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Tax attribute carryforwards
Regular net operating losses	$ 363,530
Alternative minimum tax net operating losses	99,954
Capital losses	93,837
Alternative minimum tax credits	3,136
Foreign tax credits	19,494
United States [Member]
Tax attribute carryforwards
Regular net operating losses	226,985
Alternative minimum tax net operating losses	99,954
Capital losses	90,258
Alternative minimum tax credits	3,136
Foreign tax credits	19,494
Argentina [Member]
Tax attribute carryforwards
Regular net operating losses	21,061
Alternative minimum tax net operating losses	0
Capital losses	0
Alternative minimum tax credits	0
Foreign tax credits	0
Canada [Member]
Tax attribute carryforwards
Regular net operating losses	7,203
Alternative minimum tax net operating losses	0
Capital losses	3,579
Alternative minimum tax credits	0
Foreign tax credits	0
Mexico [Member]
Tax attribute carryforwards
Regular net operating losses	4,170
Alternative minimum tax net operating losses	0
Capital losses	0
Alternative minimum tax credits	0
Foreign tax credits	0
New Zealand [Member]
Tax attribute carryforwards
Regular net operating losses	97,470
Alternative minimum tax net operating losses	0
Capital losses	0
Alternative minimum tax credits	0
Foreign tax credits	0
Other [Member]
Tax attribute carryforwards
Regular net operating losses	6,641
Alternative minimum tax net operating losses	0
Capital losses	0
Alternative minimum tax credits	0
Foreign tax credits	$ 0