Stockholders' Equity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Treasury Stock Purchase Plan	$ 100,000
Treasury Stock Purchase Plan Remaining Available	$ 100,000
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	79,313
Payment, Tax Withholding, Share-based Payment Arrangement	$ 18,478	$ 6,119