Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Employee stock-based awards
Weighted Average Common Shares Outstanding-Basic (in shares)	263,855,000	211,526,000
Stock-based compensation	$ 6,549	$ 6,885
Stock-based compensation expense (income), net of tax	$ 4,585	$ 4,914
Stock-based compensation expense per basic and diluted share (in dollars per share)	$ 0.02	$ 0.02
Excess tax (deficiency) benefits from stock-based compensation	$ 0	$ (348)
Certain options as a percentage of total outstanding options	100.00%
Summary of option activity
Options outstanding balance, end of period (in shares)	4,314,629
Share-Based Compensation, aggregate disclosures
Employee stock-based awards, unrecognized compensation costs on nonvested awards	$ 61,990
Employee stock-based awards, unrecognized compensation costs on nonvested awards, weighted average period of recognition	2 years 4 months 24 days
Continuing Operations
Employee stock-based awards
Stock-based compensation	$ 6,549	6,885
Continuing Operations | Cost of sales (excluding depreciation and amortization)
Employee stock-based awards
Stock-based compensation	28	27
Continuing Operations | Selling, general and administrative expenses
Employee stock-based awards
Stock-based compensation	$ 6,521	$ 6,858
Three year vesting options
Employee stock-based awards
Certain options as a percentage of total outstanding options	83.40%
Summary of option activity
Options outstanding balance, end of period (in shares)	3,597,671
Five year vesting options
Employee stock-based awards
Certain options as a percentage of total outstanding options	14.50%
Summary of option activity
Options outstanding balance, end of period (in shares)	626,204
Ten year vesting options
Employee stock-based awards
Certain options as a percentage of total outstanding options	2.10%
Summary of option activity
Options outstanding balance, end of period (in shares)	90,754
Stock Options
Employee stock-based awards
Weighted average fair value of options granted (in dollars per share)	$ 4.26	$ 2.49
Weighted average assumptions used for grants
Expected volatility (as a percent)	25.80%	27.20%
Risk-free interest rate (as a percent)	1.96%	1.32%
Expected dividend yield (as a percent)	6.00%	7.00%
Expected life of the option	5 years 1 day	5 years 6 months 29 days
Summary of option activity
Options outstanding balance, beginning of period (in shares)	3,451,698
Options granted (in shares)	1,007,224
Options exercised (in shares)	(136,739)
Options forfeited (in shares)	(5,773)
Options expired (in shares)	(1,781)
Options outstanding balance, end of period (in shares)	4,314,629
Options exercisable balance (in shares)	2,126,229
Options expected to vest (in shares)	2,022,212
Weighted Average Exercise Price
Weighted average exercise price, options outstanding balance beginning of period (in dollars per share)	$ 31.79
Weighted average exercise price, options granted (in dollars per share)	36.89
Weighted average exercise price, options exercised (in dollars per share)	22.24
Weighted average exercise price, options forfeited (in dollars per share)	28.21
Weighted average exercise price, options expired (in dollars per share)	38.83
Weighted average exercise price, options outstanding balance end of period (in dollars per share)	33.29
Weighted average exercise price, options exercisable (in dollars per share)	30.09
Weighted average exercise price, options expected to vest (in dollars per share)	$ 36.41
Weighted average remaining contractual term
Weighted average remaining contractual term, options outstanding	7 years 6 months 26 days
Weighted average remaining contractual term, options exercisable	5 years 10 months 2 days
Weighted average remaining contractual term, options expected to vest	9 years 2 months 27 days
Aggregate intrinsic value
Aggregate intrinsic value, options outstanding	$ 17,780
Aggregate intrinsic value, options exercisable	15,685
Aggregate intrinsic value, options expected to vest	1,955
Aggregate intrinsic value of stock options exercised
Aggregate intrinsic value of stock options exercised	$ 1,912	$ 1,433
Employee Stock Purchase Plan
Employee Stock Purchase Plan
Percentage of market price for the purchase of shares	95.00%
Employee stock purchase plan, shares available for grant	727,594
Performance units
Dividends accrued
Accrued cash dividends	$ 324	262
Cash dividends paid	$ 205	645
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)	438,302
Granted (in shares)	229,692
Vested (in shares)	(32,776)
Forfeited (in shares)	(132,509)
Non-vested at the end of the period (in shares)	502,709
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share)	$ 33.67
Weighted average grant date fair value, granted (in dollars per share)	41.93
Weighted average grant date fair value, vested (in dollars per share)	27.60
Weighted average grant date fair value, forfeited (in dollars per share)	28.57
Weighted average grant date fair value, non-vested, end of period (in dollars per share)	$ 39.18
Total fair value of shares or units vested	$ 905	4,081
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 2015
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	25.00%
Performance units | Two Thousand Sixteen [Member] [Member]
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	100.00%
Performance units | Two Thousand Seventeen [Member]
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	100.00%
Performance units | Revenue or revenue growth and return on invested capital
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
Performance units disclosure
Percentage payout rate	0.00%
Performance units | Minimum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate	0.00%
Performance units | Maximum | Revenue or revenue growth and return on invested capital
Performance units disclosure
Percentage payout rate	200.00%
Performance units | Maximum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate	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)	559,340
Granted (in shares)	229,692
Vested (in shares)	(32,776)
Forfeited (in shares)	(3,480)
Non-vested at the end of the period (in shares)	752,776
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)	(121,038)
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	(129,029)
Non-vested at the end of the period (in shares)	(250,067)
Restricted Stock Units
Employee stock-based awards
Accrued cash dividends	$ 683	631
Dividends accrued
Cash dividends paid	$ 1,855	1,635
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)	1,163,393
Granted (in shares)	525,328
Vested (in shares)	(438,091)
Forfeited (in shares)	(11,597)
Non-vested at the end of the period (in shares)	1,239,033
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share)	$ 33.21
Weighted average grant date fair value, granted (in dollars per share)	36.90
Weighted average grant date fair value, vested (in dollars per share)	32.02
Weighted average grant date fair value, forfeited (in dollars per share)	34.65
Weighted average grant date fair value, non-vested, end of period (in dollars per share)	$ 35.18
Total fair value of shares or units vested	$ 14,026	$ 14,978
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