Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Stock-Based Compensation

Summary of stock option activity

	SHARES			WEIGHTED- AVERAGE EXERCISE PRICE	AVERAGE REMAINING CONTRACTUAL LIFE (in years)		AGGREGATE INTRINSIC VALUE (in thousands)
Options outstanding at January 1, 2012	3,948,874		$	28.91	2.4
Granted	756,000			18.55
Exercised	(568,293	)		18.89
Forfeited	(717,158	)		35.38
Options outstanding at December 31, 2012	3,419,423		$	26.92	2.9	$	42,992
Available for future grant	3,016,108
Total shares reserved at December 31, 2012	6,435,531
Options exercisable at December 31, 2012	1,967,786		$	33.10	1.6	$	16,939
Options outstanding at January 1, 2013	3,419,423		$	26.92	2.9
Granted	–			–
Exercised	(863,933	)		24.55
Forfeited	(229,289	)		34.88
Options outstanding at December 31, 2013	2,326,201		$	27.02	2.3	$	44,123
Available for future grant	3,303,855
Total shares reserved at December 31, 2013	5,630,056
Options exercisable at December 31, 2013	1,650,893		$	30.74	1.6	$	26,908
Options outstanding at January 1, 2014	2,326,201		$	27.02	2.3
Granted	–			–
Exercised	(758,231	)		27.18
Forfeited	(182,473	)		54.58
Options outstanding at December 31, 2014	1,385,497		$	23.30	2.2	$	25,168
Available for future grant	3,515,345
Total shares reserved at December 31, 2014	4,900,842
Options exercisable at December 31, 2014	1,172,500		$	24.16	1.9	$	20,917

Summary of stock options outstanding and exercisable

	OPTIONS OUTSTANDING					OPTIONS EXERCISABLE
RANGE OF EXERCISE PRICES		NUMBER OUTSTANDING	WEIGHTED- AVERAGE REMAINING LIFE (in years)		WEIGHTED- AVERAGE EXERCISE PRICE		NUMBER EXERCISABLE		WEIGHTED- AVERAGE EXERCISE PRICE
$16.52 to $18.05		473,334	1.2	$	16.53		470,001	$	16.52
$18.22 to $22.78		553,997	4.1		18.26		351,000		18.28
$23.27 to $72.13		358,166	0.7		40.05		351,499		40.23

Summary of the Company's nonvested options

	2014					2013					2012
		SHARES			WEIGHTED- AVERAGE GRANT-DATE FAIR VALUE		SHARES			WEIGHTED- AVERAGE GRANT-DATE FAIR VALUE		SHARES			WEIGHTED- AVERAGE GRANT-DATE FAIR VALUE
Nonvested options outstanding at January 1		675,308		$	6.84		1,451,637		$	7.08		1,374,628		$	7.00
Granted		–			–		–			–		756,000			7.21
Vested		(444,646	)		6.64		(697,667	)		7.35		(611,659	)		7.03
Forfeited		(17,665	)		7.07		(78,662	)		6.78		(67,332	)		7.47
Nonvested options outstanding at December 31		212,997		$	7.23		675,308		$	6.84		1,451,637		$	7.08

Summary of activity that relates to the Company's restricted stock unit awards

	2014		2013		2012
Restricted stock units at January 1	539,106		774,217		657,825
Shares awarded	131,597		143,594		473,408
Shares vested	(298,791	)	(354,369	)	(350,349	)
Shares forfeited	(3,828	)	(24,336	)	(6,667	)
Restricted stock units at December 31	368,084		539,106		774,217