Consolidated Condensed Statements Of Cash Flow (Parenthetical) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Shares repurchased under the share repurchase program, value	[1]	$ 75,763,000	$ 16,767,000
Stock Repurchase Authorization
Shares repurchased under the share repurchase program, value		$ 75,000,000	$ 15,800,000

[1] 2016 and 2015 include $ 75.0 million and $ 15.8 million, respectively, repurchased under share repurchase programs.