Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Effective tax rate (in hundredths)	24.00%	29.00%	27.20%	29.80%
Discrete tax benefits	$ 8,131	$ 5,524	$ 8,131	$ 7,429
Pre-discrete tax rate	27.30%	30.80%	28.50%	30.60%
Taxable gain on sale			$ 325,000
Sargent Aerospace [Member]
Tax liability on sale			108,000
Datamax ONeil [Member]
Tax liability on sale			8,600
Minimum [Member]
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, lower bound	$ 0		0
Maximum [Member]
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, lower bound	$ 18,200		$ 18,200