Long-Term Equity Compensation (Tables)

12 Months Ended

Dec. 31, 2015

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

Intrinsic Value of Options Exercised

The following table provides the total intrinsic value of options exercised during the years ended December 31:

	2015		2014		2013
Total intrinsic value of options exercised	$	11,889,560	$	18,608,206	$	3,138,634

Summary of Options Outstanding and Exercisable

	Options Outstanding			Options Exercisable
Range of Exercise Prices	Number of Options	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price	Number of Options	Weighted Average Exercise Price
$15.30 – 20.00	106,000	0.55	$15.45	106,000	$15.45
20.01 – 25.00	507,579	1.18	23.08	507,579	23.08
25.01 – 30.00	62,000	2.33	28.00	62,000	28.00
30.01 – 40.00	341,050	1.99	31.47	341,050	31.47
40.01 – 50.00	346,543	0.37	45.91	346,543	45.91
50.01 – 58.07	69,013	1.36	55.65	69,013	55.65
$15.30 – 58.07	1,432,185	1.19	$31.82	1,432,185	$31.82

Schedule of Options, Units, and Restricted Stock

The following table presents the number of stock options, RSUs and PSUs granted during the years ended December 31:

	2015	2014	2013
Options granted	—	—	—
RSUs and PSUs granted	701,069	881,338	1,143,881

Schedule of Share-Based Compensation Expense

Share-based compensation expense recorded for the years ended December 31, is as follows:

	2015		2014		2013
	(Amounts in thousands)
Compensation expense - options	$	28	$	574	$	3,711
Compensation expense - RSUs and PSUs	$	29,424	$	27,759	$	26,219

Schedule of Unrecognized Compensation Costs and Related Weighted Average Period Costs

As of December 31, 2015, the remaining unrecognized compensation costs and the respective weighted-average recognition periods are as follows:

	Non-vested Options		Non-vested RSUs & PSUs
Remaining unrecognized compensation cost (in millions)	$	—	$	41.4
Remaining weighted-average period (in years)	0		0.99

Stock Options [Member]

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

Summary of Stock Options, RSUs and PSUs

A summary of option activity under our various plans as of December 31, 2015, and changes during the year then ended is presented below:

	Number of Options	Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2015	1,952,211	$33.01
Granted	—	—
Exercised	(517,351)	36.18
Forfeited or expired	(2,675)	54.85
Outstanding at December 31, 2015	1,432,185	$31.82	1.19	$	52,474,895
Vested or expected to vest at December 31, 2015 (reflecting estimated forfeiture rates effective in 2015)	1,432,185	$31.82	1.19	$	52,474,895
Exercisable at December 31, 2015	1,432,185	$31.82	1.19	$	52,474,895

Restricted Stock Units and Performance Stock Units [Member]

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

Summary of Stock Options, RSUs and PSUs

A summary of RSU and PSU activity under our various plans as of December 31, 2015, and changes during the year then ended is presented below:

	Number of Restricted Stock Units and Performance Share Units	Weighted Average Grant-Date Fair Value		Weighted Average Purchase Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2015	1,724,295	$	30.82		$—
Granted	701,069	57.98		—
Vested	(807,626)	31.36		—
Forfeited	(68,002)	31.26		—
Outstanding at December 31, 2015	1,549,736	$	42.80	—		0.81	$	106,094,927
Expected to vest at December 31, 2015 (reflecting estimated forfeiture rates effective in 2015)	1,474,095	$	42.77		$—	0.85	$	100,916,537

Weighted Average Grant Date Fair Value and Aggregate Intrinsic Value for RSU and PSU

The weighted-average grant-date fair values and aggregate intrinsic values of RSUs and PSUs vested during the years ended December 31, are as follows:

	2015		2014		2013
Weighted-average grant-date fair values of RSUs and PSUs vested	$	31.36	$	29.68	$	29.43
Aggregate intrinsic value of RSUs and PSUs vested (in millions)	$	45.9	$	30.5	$	18.5