Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Effective tax rate (in hundredths)	29.60%	30.60%	29.30%	30.20%
Discrete tax benefits				$ 1,900,000
Pre-discrete tax rate	29.30%	30.40%		30.50%
Taxable gain on sale			$ 325,000,000
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, lower bound	$ 0		0
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound	$ 21,600,000		21,600,000
Sargent Aerospace [Member]
Tax liability on sale			108,000,000
Datamax ONeil [Member]
Tax liability on sale			$ 8,600,000