Note 15 - Share-Based and Other Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of outstanding awards and compensation expense recognized for each type of share-based award

The following table summarizes awards outstanding and compensation expense recognized for each type of share-based award as of and for the years ended:

	December 31,
($ in thousands)	2015				2014				2013
Share-Based Compensation Programs	Liability Recorded/ Equity Instruments Outstanding		Compensation Cost Recognized (1)		Liability Recorded/ Equity Instruments Outstanding		Compensation Cost Recognized (1)		Liability Recorded/ Equity Instruments Outstanding		Compensation Cost Recognized (1)
Liabilities:
RSUs—Cash-Settled	$	3,595	$	10,244	$	65,157	$	31,834	$	104,114	$	79,322
SARs—Cash-Settled	—		159		595		915		8,195		8,544
Liabilities	$	3,595	10,403		$	65,752	32,749		$	112,309	87,866
Equity:
Stock Options	2,692,457		2,984		3,029,348		2,531		3,989,641		2,488
Phantom Stock	230,196		2		284,645		3		284,645		3
RSUs—Equity Settled	2,472,861		9,243		2,056,596		7,461		1,273,556		4,336
Restricted Stock	—		—		—		—		—		21
ESPP			396				267				267
Equity			12,625				10,262				7,115
Total all share-based plans			$	23,028			$	43,011			$	94,981

______________

(1) For purposes of calculating compensation cost recognized, we generally consider time-vested awards effectively vested (and we recognize the full compensation costs) when grantees become retirement eligible. However, under the terms of our stock option awards granted in 2015, 2014, and 2013, legal vesting for retirement occurs when the grantee actually separates from service, with the exception of certain senior executives for whom vesting remains dependent on the stock price hurdle being met regardless of when the executive separates from service. Performance-based RSU awards granted in 2015, 2014, and 2013 provide that vesting remains dependent on the Company’s performance for the full term of the awards notwithstanding the grantee’s earlier retirement.

Schedule of additional information regarding all share-based awards

The following table reflects additional information regarding all share-based awards for the years indicated:

	Year Ended December 31,
($ in thousands except per-share amounts)	2015		2014		2013
Total compensation cost recognized	$	23,028	$	43,011	$	94,981
Less: Costs deferred as acquisition costs	500		1,047		1,769
Stock-based compensation expense	$	22,528	$	41,964	$	93,212

Schedule of information with regard to stock options

Information with regard to stock options for the periods indicated is as follows:

	Number of Shares		Weighted Average Exercise Price Per Share
Outstanding, December 31, 2014	3,029,348		$	5.46
Granted	212,230		18.42
Exercised	(496,496	)	2.59
Forfeited	(52,625	)	8.89
Expired	—		—
Outstanding, December 31, 2015	2,692,457		6.94
Exercisable, December 31, 2015	1,435,232		4.44
Available for grant, December 31, 2015	2,803,988

Schedule of fully vested share options

The table below summarizes information regarding fully vested stock options as of December 31, 2015:

($ in millions, except share and per share amounts)	Outstanding and Exercisable
Number of options vested	1,435,232
Fair value of options vested during the year	$	3.4
Weighted-average exercise price per share	$	4.44
Aggregate intrinsic value (excess market price over exercise price)	$	12.9
Weighted-average remaining contractual term of options (in years)	4.1 years

Schedule of outstanding and exercisable options

The following table summarizes information concerning outstanding and exercisable options at December 31, 2015:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number Outstanding	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$2.45 - $3.58	1,718,010	5.2	$	2.80	1,153,515	$	2.98
$5.76 - $7.06	47,967	2.2	6.92		47,967	6.92
$10.42 - $15.44	718,790	6.1	13.53		225,580	10.91
$18.42	207,690	3.0	18.42		8,170	18.42
	2,692,457	4.3			1,435,232

Schedule of valuation assumptions of stock options granted

We use the Monte Carlo valuation model in determining the grant date fair value of stock options issued to executives and non-executives using the assumptions noted in the following table:

	Year Ended December 31,
	2015		2014		2013
Derived service period (years)	3.02 - 4.00		2.99 - 3.96		3.02 - 4.00
Risk-free interest rate (1)	2.32	%	2.57	%	1.96	%
Volatility (2)	93.70	%	94.26	%	94.63	%
Dividend yield	0.05	%	0.07	%	0.07	%

______________

(1) The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant.

(2) Volatility is determined at the date of grant using historical share price volatility and expected life of each award.

Schedule of valuation assumptions of performance based RSU

The following are assumptions used in our calculation of the grant date fair value of performance-based RSUs to be settled in common stock:

	2015		2014		2013
Expected life	3 years		3 years		3 years
Risk-free interest rate	1.0	%	1.0	%	0.4	%
Volatility	40.6	%	71.9	%	81.8	%
Dividend yield	0.05	%	0.06	%	0.07	%

Schedule of changes in RSU to be settled under 2008 Equity Plan

Information with regard to RSUs to be settled in stock for the periods indicated is as follows:

	Number of Shares		Weighted Average Grant Date Fair Value
Unvested, December 31, 2014	2,056,596		$	10.65
Granted	612,881		18.26
Vested	(121,989	)	5.83
Forfeited	(74,627	)	15.55
Unvested, December 31, 2015	2,472,861		12.62

Schedule of valuation assumptions of ESPP

The following are assumptions used in our calculation of ESPP compensation expense during 2015:

	January 1, 2015		July 1, 2015
Expected life	6 months		6 months
Risk-free interest rate	0.36	%	0.44	%
Volatility	35.03	%	26.83	%
Dividend yield	0.03	%	0.03	%