Share Repurchase Program (Tables)

12 Months Ended

Dec. 31, 2014

Proceeds from (Repurchase of) Equity [Abstract]

Schedule of shares repurchased

	For the Year Ended   December 31,
	2014		2013
Shares repurchased	5,743		8,529
Average price per share	$	150.86	$	109.38
Total investment	$	866,398	$	932,900