Repurchases Of Common Stock (Tables)

9 Months Ended

Sep. 30, 2017

Repurchases Of Common Stock [Abstract]

Schedule Of Common Stock Repurchases

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Shares repurchased in the open market		312		142		1,398		1,119
Shares acquired through employee surrender for statutory tax withholding		2		2		55		56
Total shares repurchased		314		144		1,453		1,175
Cost of shares repurchased in the open market	$	50,413	$	15,260	$	215,320	$	88,235
Cost of shares for employee surrenders		370		218		7,829		3,950
Total cost of shares	$	50,783	$	15,478	$	223,149	$	92,185
Average cost per share - open market repurchase	$	161.57	$	107.38	$	153.99	$	78.84
Average cost per share - employee surrenders	$	155.14	$	112.91	$	142.15	$	70.33
Average cost per share - total	$	161.52	$	107.46	$	153.54	$	78.43