Leases (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Text Block [Abstract]

Schedule of operating lease costs [Table Text Block]

	Year ended December 31,
	2019
Operating lease cost	$	5,260
Variable lease cost		3,920
Short-term lease cost		177
Total lease costs	$	9,357

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

	December 31,
	2019
Weighted average remaining lease term (years)		8.50
Weighted average discount rate		5.14	%

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

2020		8,426
2021		7,872
2022		7,178
2023		6,822
2024		6,264
2025 and thereafter		28,784
Total undiscounted cash flows		65,346
Less imputed interest		(13,640	)
Present value of lease liabilities	$	51,706