Consolidated Statements of Cash Flows (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Early extinguishment of debt charges	$ 13,308	$ 2,631	$ 45,674
Cash paid for capitalized interest	17,549	14,480	5,618
Refunds received	$ 1,007	$ 16,118	$ 113,934