11. Commitments (Tables)

3 Months Ended

Mar. 31, 2019

	Three Months Ended March 31,
	2019
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	3,977
Non-cash activity:
Right-of-use assets obtained in exchange for lease obligations	$	43,330

	Balance Sheet Classification	March 31, 2019
Right-of-use assets	Other assets	$	39,353
Current lease liabilities	Accrued expenses and other current liabilities	$	26,234
Non-current lease liabilities	Other liabilities	$	13,119