Share Repurchase Program (Tables)

3 Months Ended

Mar. 31, 2014

Proceeds from (Repurchase of) Equity [Abstract]

Schedule of shares repurchased

	For the Three Months Ended March 31,
	2014		2013
Shares repurchased	149		2,468
Average price per share	$	148.18	$	92.35
Total investment	$	22,065	$	227,893