Income Taxes - Schedule of Earnings Before Incomes Taxes, Income Tax Expense and Effective Income Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Earnings before income taxes	$ 14,151	$ 9,703
Income tax expense	$ 3,327	$ 2,157
Effective income tax rate	23.50%	22.20%