Retirement Plans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ 1,100,000	$ 0	$ 2,300,000	$ 0
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions in current fiscal year	0		0
United States
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ 1,100,000	$ 0	$ 2,300,000	$ 0