Consolidated Statements of Cash Flows (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information
Interest paid, net of amounts capitalized	$ 90,448	$ 90,477	$ 84,003
Interest capitalized	1,632	4,852	2,481
Income taxes paid	$ 3,399	$ 4,467	$ 2,920