Employee Benefits and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Stock Option Activity under 2006 EIP and 2013 LTIP

The following table presents the stock option activity under the 2006 EIP and 2013 LTIP for the year ended December 31, 2015:


	Stock or Options Available for Grant			Options Outstanding
	Stock or Options Available for Grant			Number of Shares			Weighted Average Exercise Price
Balance at January 1, 2015		6,278,516			2,954,227		$	27.05
Options granted		—			—			—
Options exercised		—			(400,592	)		24.65
Options canceled or forfeited (2013 LTIP)		36,496			(36,496	)		23.93
Options canceled or forfeited (2006 EIP)		—			(237,109	)		31.32
Restricted stock granted		(645,568	)		—			—
Restricted stock canceled		198,839			—			—

Balance at December 31, 2015		5,868,283			2,280,030		$	27.08

Summary of Information on Options Granted under Executive Incentive Plan

The following table summarizes the information on the options granted under the 2006 EIP and 2013 LTIP at December 31, 2015:


Outstanding								Exercisable
Range of Exercise Prices		Number of Options		Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number of Options		Weighted Average Exercise Price
	$0.00 - $13.12		69,136		0.93	$	13.12		69,136	$	13.12
	13.13 - 28.88		1,694,648		6.48	$	25.10		994,611	$	25.23
	28.89 - 50.88		498,248		5.57	$	33.89		498,248	$	33.89
	50.89 - 84.80		17,998		4.67	$	77.74		16,434	$	77.06

	$0.00 - $84.80		2,280,030		6.10	$	27.08		1,578,429	$	27.98

Executive Management Rollover Options


Executive Management Rollover Options			Options Outstanding
	Options Available for Grant		Number of Shares			Weighted Average Exercise Price
Balance at January 1, 2015		—		12,416		$	5.47
Exercised		—		(12,416	)		5.47

Balance at December 31, 2015		—		—		$	—

Summary of Estimated Fair Value of 2006 EIP Option Awards on Grant Date Using Black-Scholes Option

We account for the stock option grants under the 2006 EIP and 2013 LTIP in accordance with Accounting Standards Codification 718, Compensation-Stock Compensation. The fair value of each option granted was estimated on the date of grant using a Black-Scholes option pricing model with the following weighted average assumptions used for valuation purposes for grants during the period:


	2014			2013
Risk-free interest rate		2.02	%		1.56	%
Dividend yield		3.64	%		3.07	%
Expected volatility		29.10	%		35.20	%
Expected life (years)		6.25			6.25
Weighted-average grant date fair value of options granted	$	4.90		$	6.05