Leases Balance Sheet and Supplemental Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease right-of-use assets (Other assets on Consolidated Balance Sheets)	$ 19,595
Operating lease liabilities(Accrued expenses and other liabilities on Consolidated Balance Sheets)	20,101
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 94
Weighted average remaining lease term	3 years 5 months 12 days
Weighted average discount rate	4.84%