Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Employee stock-based awards
Weighted Average Common Shares Outstanding-Basic (in shares)	263,269,000	210,912,000	240,394,000	210,616,000
Stock-based compensation	$ 20,936	$ 6,159	$ 21,870	$ 5,957
Stock-based compensation expense (income), net of tax	$ 14,915	$ 4,502	$ 16,170	$ 4,245
Stock-based compensation expense per basic and diluted share (in dollars per share)	$ 0.07	$ 0.02	$ 0.07	$ 0.02
Excess tax benefit (deficiency) from stock-based compensation			$ 91	$ 323
Summary of option activity
Options outstanding balance, end of period (in shares)	3,704,010		3,704,010
Share-Based Compensation, aggregate disclosures
Employee stock-based awards, unrecognized compensation costs on nonvested awards	$ 43,137		$ 43,137
Employee stock-based awards, unrecognized compensation costs on nonvested awards, weighted average period of recognition			2 years 7 days
Continuing Operations
Employee stock-based awards
Stock-based compensation	5,957	$ 6,159	$ 21,870	20,936
Continuing Operations | Cost of sales (excluding depreciation and amortization)
Employee stock-based awards
Stock-based compensation	28	65	80	156
Continuing Operations | Selling, general and administrative expenses
Employee stock-based awards
Stock-based compensation	$ 5,929	6,094	$ 21,790	$ 20,780
Three year vesting options
Employee stock-based awards
Certain options as a percentage of total outstanding options	76.30%		76.30%
Summary of option activity
Options outstanding balance, end of period (in shares)	2,826,698		2,826,698
Five year vesting options
Employee stock-based awards
Certain options as a percentage of total outstanding options	16.80%		16.80%
Summary of option activity
Options outstanding balance, end of period (in shares)	622,057		622,057
Ten year vesting options
Employee stock-based awards
Certain options as a percentage of total outstanding options	6.90%		6.90%
Summary of option activity
Options outstanding balance, end of period (in shares)	255,255		255,255
Stock Options
Employee stock-based awards
Weighted average fair value of options granted (in dollars per share)			$ 2.55	$ 4.88
Weighted average assumptions used for grants
Expected volatility (as a percent)			27.20%	28.40%
Risk-free interest rate (as a percent)			1.32%	1.70%
Expected dividend yield (as a percent)			7.00%	5.00%
Expected life of the option			5 years 6 months 29 days	5 years 6 months
Summary of option activity
Options outstanding balance, beginning of period (in shares)			3,688,814
Options granted (in shares)			1,435,879
Options exercised (in shares)			(1,373,290)
Options forfeited (in shares)			(35,927)
Options expired (in shares)			(11,466)
Options outstanding balance, end of period (in shares)	3,704,010		3,704,010
Options exercisable balance (in shares)	1,553,980		1,553,980
Options expected to vest (in shares)	2,025,402		2,025,402
Weighted Average Exercise Price
Weighted average exercise price, options outstanding balance beginning of period (in dollars per share)			$ 27.79
Weighted average exercise price, options granted (in dollars per share)			34.02
Weighted average exercise price, options exercised (in dollars per share)			24.12
Weighted average exercise price, options forfeited (in dollars per share)			32.43
Weighted average exercise price, options expired (in dollars per share)			30.50
Weighted average exercise price, options outstanding balance end of period (in dollars per share)	$ 31.51		31.51
Weighted average exercise price, options exercisable (in dollars per share)	26.08		26.08
Weighted average exercise price, options expected to vest (in dollars per share)	$ 35.44		$ 35.44
Weighted average remaining contractual term
Weighted average remaining contractual term, options outstanding			7 years 29 days
Weighted average remaining contractual term, options exercisable			4 years 6 months 15 days
Weighted average remaining contractual term, options expected to vest			8 years 10 months 28 days
Aggregate intrinsic value
Aggregate intrinsic value, options outstanding	$ 26,628		$ 26,628
Aggregate intrinsic value, options exercisable	19,208		19,208
Aggregate intrinsic value, options expected to vest	7,020		7,020
Aggregate intrinsic value of stock options exercised
Aggregate intrinsic value of stock options exercised	$ 5,433	1,985	$ 16,792	$ 7,868
Employee Stock Purchase Plan
Employee Stock Purchase Plan
Percentage of market price for the purchase of shares			95.00%
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period			56,662	59,569
Employee stock purchase plan, shares available for grant	781,767		781,767
Performance units
Dividends accrued
Accrued cash dividends	$ 264	222	$ 789	$ 647
Cash dividends paid	$ 0	0	$ 645	1,015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)			433,805
Granted (in shares)			230,052
Vested (in shares)			(148,855)
Forfeited (in shares)			(41,769)
Non-vested at the end of the period (in shares)	473,233		473,233
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share)			$ 34.11
Weighted average grant date fair value, granted (in dollars per share)			35.84
Weighted average grant date fair value, vested (in dollars per share)			35.42
Weighted average grant date fair value, forfeited (in dollars per share)			42.87
Weighted average grant date fair value, non-vested, end of period (in dollars per share)	$ 33.77		$ 33.77
Total fair value of shares or units vested	$ 17	0	$ 5,272	2,107
Performance units disclosure
Period of anniversary from the date of grant			3 years
Qualifying age for grant of performance units			55 years
Qualifying service period			10 years
Performance units | PUs granted in 2014
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	0.00%		0.00%
Performance units | PUs granted in 2015
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	50.00%		50.00%
Performance units | Two Thousand Sixteen [Member] [Member]
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	100.00%		100.00%
Performance units | Revenue or revenue growth and return on invested capital | PUs granted in 2014
Performance units disclosure
Performance period			3 years
Performance units | Market condition associated with shareholder return of common stock
Performance units disclosure
Performance period			3 years
Performance units | Minimum | Revenue or revenue growth and return on invested capital | PUs granted in 2014
Performance units disclosure
Percentage payout rate	0.00%		0.00%
Performance units | Minimum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate	0.00%		0.00%
Performance units | Maximum | Revenue or revenue growth and return on invested capital | PUs granted in 2014
Performance units disclosure
Percentage payout rate	200.00%		200.00%
Performance units | Maximum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate	200.00%		200.00%
Original PU Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)			520,764
Granted (in shares)			230,052
Vested (in shares)			(148,855)
Forfeited (in shares)			(7,690)
Non-vested at the end of the period (in shares)	594,271		594,271
PUs Adjustment
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)			(86,959)
Granted (in shares)			0
Vested (in shares)			0
Forfeited (in shares)			(34,079)
Non-vested at the end of the period (in shares)	(121,038)		(121,038)
Restricted Stock Units
Employee stock-based awards
Accrued cash dividends	$ 620	616	$ 1,867	1,917
Dividends accrued
Cash dividends paid	$ 129	270	$ 1,960	2,570
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)			1,217,597
Granted (in shares)			671,385
Vested (in shares)			(575,875)
Forfeited (in shares)			(59,627)
Non-vested at the end of the period (in shares)	1,253,480		1,253,480
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share)			$ 33.68
Weighted average grant date fair value, granted (in dollars per share)			32.36
Weighted average grant date fair value, vested (in dollars per share)			33.47
Weighted average grant date fair value, forfeited (in dollars per share)			33.74
Weighted average grant date fair value, non-vested, end of period (in dollars per share)	$ 33.07		$ 33.07
Total fair value of shares or units vested	$ 1,486	$ 2,377	$ 19,271	$ 21,561
Restricted Stock Units | Minimum
Employee stock-based awards
Award vesting period			3 years
Restricted Stock Units | Maximum
Employee stock-based awards
Award vesting period			5 years