Common Stock (Tables)

12 Months Ended

Dec. 31, 2015

Equity and Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

A summary of the transactions within the Company’s stock option plans follows (shares in thousands):



	Shares		Weighted-Average Exercise Price
Outstanding at January 1, 2013	1,288		$	13.69
Granted	74		53.78
Exercised	(484	)	12.22
Canceled	(3	)	23.63
Outstanding at December 31, 2013	875		17.85
Granted	—		—
Exercised	(213	)	11.21
Canceled	(10	)	19.98
Outstanding at December 31, 2014	652		19.99
Granted	—		—
Exercised	(87	)	13.54
Canceled	(4	)	20.29
Outstanding at December 31, 2015	561		20.99
Exercisable at December 31, 2013	684		$	11.67
Exercisable at December 31, 2014	564		$	16.18
Exercisable at December 31, 2015	537		$	19.49

Schedule of share authorized under stock option plan, by exercise price range

As of December 31, 2015 (options in thousands):



	Options Outstanding				Options Exercisable
Range of Exercise Prices	Amount Outstanding	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Amount Exercisable	Weighted Average Exercise Price
$0.01-5.00	100	3.2	$	3.38	100	$	3.38
5.01-10.00	189	4.2	8.32		189	8.32
10.01-15.00	14	3.1	14.45		14	14.45
15.01-20.00	20	3.7	15.58		20	15.58
25.01-30.00	51	3.5	25.85		51	25.85
30.01-35.00	62	5.2	31.49		62	31.49
40.01-45.00	51	6.1	41.25		51	41.25
50.01-55.00	74	7.2	53.78		50	53.78
	561		$	20.99	537	$	19.49

Summary of options outstanding

The following table presents information associated with options as of December 31, 2015 and 2014, and for the years ended December 31, 2015, 2014 and 2013:



	2015		2014		2013
Intrinsic value of options outstanding as of December 31	$	29	$	53
Intrinsic value of options exercisable as of December 31	28		48
Intrinsic value of options exercised	7		17		21
Weighted-average grant date fair value per option	$	—	$	—	$	24.56

Summary of restricted stock units activity

A summary of RSUs granted follows (RSUs in thousands):



	Year Ended December 31,
	2015		2014		2013
RSUs granted	463		805		894
Weighted-average grant date price per unit	$	86.84	$	92.28	$	57.50

A summary of RSU activity for the year ended December 31, 2015 follows (RSUs in thousands):



	Stock Units		Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2014	702		$	68.11
Granted	463		86.84
Vested	(599	)	68.75
Forfeited	(36	)	94.30
Nonvested as of December 31, 2015	530		$	81.94