Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Restricted Stock Units Activity

RSU activity for the six months ended June 30, 2014 are summarized as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2013		233,763		$	87.97
Granted		70,302		$	183.98
Forfeited		(10,966	)	$	132.15
Settled		(115,084	)	$	60.74
Outstanding at June 30, 2014		178,015		$	140.77

Summary of Stock Option Activity

Stock option activity for the six months ended June 30, 2014 are summarized as follows:

	Number of Shares			Weighted Average Exercise Price
Outstanding at December 31, 2013		190,160		$	20.11
Granted		—		$	—
Exercised		(14,270	)	$	28.33
Forfeited		—		$	—
Outstanding at June 30, 2014		175,890		$	19.44