Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Stock-Based Compensation [Abstract]

Fair value assumptions of stock options

	2014			2013			2012
Dividend yield		2.00	%		2.00	%		2.00	%
Risk-free interest rate		2.00	%		0.99	%		1.20	%
Weighted average expected volatility		20.00	%		34.35	%		48.94	%
Weighted average expected life		6 years			6 years			6 years
Weighted average per share fair value of options	$	3.00		$	3.80		$	5.03

Summary of Company's Stock Option Activities

				Weighted Average	Aggregate
		Weighted Average		Remaining	Intrinsic
Stock Options	Shares	Exercise Price		Contractual Term	Value (000s)
Outstanding at December 31, 2011	7,055,274	$	21.99
Granted	3,060,519		12.97
Exercised	(11,120)		13.16
Forfeited or expired	(1,464,115)		21.56
Outstanding at December 31, 2012	8,640,558	$	18.88	6.40	$	570
Options exercisable at December 31, 2012	4,603,963	$	23.80	4.37	$	43
Outstanding at December 31, 2012	8,640,558		$18.88
Granted	1,020,979		$14.02
Exercised	(642,202)		$13.43
Forfeited or expired	(985,092)		$21.49
Outstanding at December 31, 2013	8,034,243	$	18.37	6.03	$	20,838
Options exercisable at December 31, 2013	4,923,720	$	21.48	4.62	$	8,580
Outstanding at December 31, 2013	8,034,243		18.37
Granted	1,389,452		17.45
Exercised	(933,143)		13.77
Forfeited or expired	(643,214)		23.50
Outstanding at December 31, 2014	7,847,338	$	18.34	5.79	$	23,986
Options exercisable at December 31, 2014	5,076,676	$	19.96	4.41	$	14,953

Summary of stock options outstanding by range of exercise prices

The following table summarizes information about the Corporation’s stock options outstanding at December 31, 2014.
	Options	Weighted Average		Remaining	Options	Weighted Average
	Outstanding	Exercise Price		Life (Years)	Exercisable	Exercise Price
Range of Exercise Prices:
$10.01 — $15.00	4,206,026		13.46	6.82	2,767,037		13.46
$15.01 — $20.00	1,856,041		17.45	7.58	524,368		17.48
$20.01 — $25.00	523,476		24.89	2.76	523,476		24.89
$25.01 — $30.00	10,500		27.72	2.47	10,500		27.72
Over $30.00	1,251,295		33.24	0.97	1,251,295		33.24
Total	7,847,338	$	18.34	5.79	5,076,676	$	19.96

Summary of Company's Nonvested Stock Option Activities

The following table summarizes information about the Corporation’s nonvested stock option activity for 2014, 2013, and 2012.
		Weighted Average
Stock Options	Shares	Grant Date Fair Value
Nonvested at December 31, 2011	2,431,339	$	5.11
Granted	3,060,519		5.03
Vested	(1,097,571)		4.88
Forfeited	(357,692)		5.12
Nonvested at December 31, 2012	4,036,595	$	5.11
Granted	1,020,979		3.80
Vested	(1,680,981)		5.10
Forfeited	(266,070)		5.05
Nonvested at December 31, 2013	3,110,523	$	4.69
Granted	1,389,452		3.00
Vested	(1,522,152)		4.92
Forfeited	(207,161)		4.38
Nonvested at December 31, 2014	2,770,662	$	3.74

Summary of Restricted Stock Awards Activity (Excluding Salary Shares)

The following table summarizes information about the Corporation’s restricted stock activity for 2014, 2013, and 2012.
		Weighted Average
Restricted Stock	Shares	Grant Date Fair Value
Outstanding at December 31, 2011	1,013,765	$	13.79
Granted	506,258		13.00
Vested	(533,014)		13.38
Forfeited	(54,584)		13.73
Outstanding at December 31, 2012	932,425	$	13.60
Granted	1,276,868		14.03
Vested	(626,480)		13.68
Forfeited	(71,048)		13.92
Outstanding at December 31, 2013	1,511,765	$	13.92
Granted	1,177,168		17.35
Vested	(538,877)		14.12
Forfeited	(167,930)		15.26
Outstanding at December 31, 2014	1,982,126	$	15.79