Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Restricted Stock Units Activity

RSU activity for the three months ended March 31, 2014 is summarized as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2013		233,763		$	87.97
Granted		43,803		$	183.95
Forfeited		—		$	—
Settled		(95,997	)	$	61.99
Outstanding at March 31, 2014		181,569		$	124.86

Summary of Stock Option Activity

Stock option activity for the three months ended March 31, 2014 is summarized as follows:

	Number of Shares			Weighted Average Exercise Price
Outstanding at December 31, 2013		190,160		$	20.11
Granted		—		$	—
Exercised		(3,643	)	$	32.50
Forfeited		—		$	—
Outstanding at March 31, 2014		186,517		$	19.87