Employee Benefits and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2016

Postemployment Benefits [Abstract]

Summary of Stock Option Activity under 2006 EIP and 2013 LTIP

The following table presents the stock or stock option activity under the 2006 EIP and 2013 LTIP for the year ended December 31, 2016:

	Stock or			Options Outstanding
	Options						Weighted
	Available			Number of			Average
	for Grant			Shares			Exercise Price
Balance at January 1, 2016		5,868,283			2,280,030		$	27.08
Options granted		—			—			—
Options exercised		—			(69,336	)		13.15
Options canceled or forfeited (2013 LTIP)		12,490			(12,490	)		23.52
Options canceled or forfeited (2006 EIP)		—			(28,899	)		33.70
Restricted stock granted		(666,733	)		—			—
Restricted stock canceled		119,480			—			—
Balance at December 31, 2016		5,333,520			2,169,305		$	27.45

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, 2016:

Outstanding							Exercisable
			Average		Weighted				Weighted
			Remaining		Average				Average
Range of	Number of		Contractual		Exercise		Number of		Exercise
Exercise Prices	Options		Life (years)		Price		Options		Price
$0.00 - $25.36		389,018		6.70	$	23.67		244,723	$	23.47
25.37 - 28.80		1,267,788		4.78	$	25.52		1,267,788	$	25.52
28.81 - 33.52		490,126		4.21	$	33.45		490,126	$	33.45
33.53 - 84.80		22,373		2.63	$	71.54		22,373	$	71.54
$0.00 - $84.80		2,169,305		4.97	$	27.45		2,025,010	$	27.70

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 2014:

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

Summary of Percentage of Target Award to Vest

In accordance with the schedule below. If the Company’s TSR is negative for the performance period, the maximum award which may vest is the target award.

	Company Percentile Rank vs. Russell 2000	Aggregate Percentage of Shares Vested
Below Threshold	Below the 30th percentile	0%
Threshold	At the  30th percentile	50%
Target	At the 55th percentile	100%
Maximum	At or above the 80th percentile	175%