Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 31,441,000	$ 29,615,000	$ 58,174,000	$ 60,789,000
Effective tax rate	21.70%	21.70%	20.70%	22.80%
Minimum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Increase in unrecognized tax benefits is reasonably possible	$ 0		$ 0
Maximum
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Increase in unrecognized tax benefits is reasonably possible	$ 800,000		$ 800,000