Share-Based Compensation (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) item $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares
Share-based compensation disclosures
Share-based compensation expense | $	$ 47,300	$ 37,200	$ 53,300
Liability related to awards | $	120,204	$ 177,707
Assumptions used to value grant date fair value
Closing stock price at grant date (in dollars per share) | $ / shares		$ 24.10
Restricted Stock Award
Share-based compensation disclosures
Share-based compensation expense | $	37,000	$ 35,000	$ 51,100
Share-based compensation expense related to the closing of the Merger | $	$ 8,700
Number of types of performance share awards | item	2
Option to purchase common stock available for grant	2,000,000
Shares awarded during period	2,547,000
Options
Forfeited (in shares)	(750,000)
Weighted Average Exercise Price
Forfeited (in dollars per share) | $ / shares	$ 17.02
Restricted Stock Award | Employees and Director
Share-based compensation disclosures
Shares awarded during period	2,546,801	1,169,000	4,493,443
Aggregate value of restricted stock awards at date of grant | $	$ 34,800	$ 26,700	$ 73,800
Fair value awards vested | $	$ 18,300	28,000	$ 37,500
Restricted Stock Award | Maximum
Share-based compensation disclosures
Vesting period of shares	5 years
Restricted Stock Award | Maximum | Employees and Director
Share-based compensation disclosures
Vesting period of shares	4 years
Restricted Stock Based on Performance Conditions | Executives
Share-based compensation disclosures
Vesting period of shares	3 years
Total fair value of option vested during the period | $	$ 6,800	$ 5,900
Shares awarded during period	438,307	362,311
Liability related to awards | $	$ 2,200	$ 2,500
Restricted Stock Based on Market Conditions
Share-based compensation disclosures
Vesting period of shares	3 years
Shares awarded during period	545,000	395,550	353,933
Aggregate value of restricted stock awards at date of grant | $	$ 4,700	$ 4,500	$ 3,700
Assumptions used to value grant date fair value
Risk free interest rate (as a percent	1.18%	0.80%	0.41%
Expected volatility (as a percent)	50.00%	40.00%	46.00%
Closing stock price at grant date (in dollars per share) | $ / shares	$ 12.98	$ 18.19	$ 16.53
Expected term (in years)	3 years	2 years 11 months 19 days	2 years 9 months 26 days
Stock options | Maximum | Employees and Director
Share-based compensation disclosures
Vesting period of shares	5 years
Stock options | Minimum | Employees and Director
Share-based compensation disclosures
Vesting period of shares	3 years
Key Officer Director and Managerial Employee Stock Options
Share-based compensation disclosures
Option to purchase common stock available for grant	3,300,000	6,300,000
Exercise period	10 years
Total fair value of option vested during the period | $	$ 1,900	$ 2,000	$ 4,300
Assumptions used to value grant date fair value
Granted (in dollars per share) | $ / shares	$ 4.40	$ 6.76	$ 6.05
Risk free interest rate (as a percent	1.29%	1.37%	0.79%
Dividend yield (as a percent)	2.05%	1.21%	0.84%
Expected volatility (as a percent)	51.01%	51.01%	51.01%
Expected term (in years)	4 years	4 years	4 years
Options
Options outstanding at the beginning of the period (in shares)	11,304,000
Granted (in shares)	158,000
Exercised (in shares)	(140,000)
Forfeited (in shares)	(6,024,000)
Options outstanding at the end of the period (in shares)	5,298,000	11,304,000
Options exercisable at the end of the period (in shares)	5,069,000
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 23.30
Granted (in dollars per share) | $ / shares	12.34
Exercised (in dollars per share) | $ / shares	9.24
Forfeited (in dollars per share) | $ / shares	32.86
Options outstanding at the end of the period (in dollars per share) | $ / shares	12.48	$ 23.30
Options exercisable at the end of the period (in dollars per share) | $ / shares	$ 12.15
Weighted Average Remaining Contractual Term
Options outstanding at the end of the period	4 years 2 months 5 days
Options exercisable at the end of the period	4 years 18 days
Key Officer Director and Managerial Employee Stock Options | Employees Executives And Directors
Options
Granted (in shares)	158,219	60,662	63,368