Share Repurchase Program (Tables)

3 Months Ended

Mar. 31, 2016

Proceeds from (Repurchase of) Equity [Abstract]

Schedule of shares repurchased

	For the Three Months Ended   March 31,
	2016		2015
Shares repurchased	1,231		650
Average price per share	$	254.02	$	207.50
Total investment	$	312,637	$	134,803