Capital Stock Repurchase Plan Transactions (Tables)

3 Months Ended

Mar. 31, 2018

Capital Stock Repurchase Plan Transactions [Abstract]

Schedule Of Capital Stock Repurchases

	Three months ended March 31,
	2018		2017
Total cost of repurchased shares (in thousands)	$	81,125	$	54,262
Shares repurchased		300,000		300,000
Weighted average price per share	$	270.42	$	180.87