Statements of Condensed Consolidated Cash Flows (Parenthetical) - Assets held for sale - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Cash presented within assets held for sale at beginning of period	$ 0	$ 0	$ 394
Cash presented within assets held for sale at end of period	$ 0	$ 0	$ 0