Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

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

As of December 31, 2018, the approximate aggregate minimum future payments required on the operating leases, net of rent abatement and certain other rent credits, are as follows:

2019	$	36,537
2020	39,059
2021	39,561
2022	39,585
2023	27,564
Thereafter	403,450
Total	$	585,756

Restrictions on Cash and Cash Equivalents

Restricted Cash – The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the statements of financial position that sum to the total of amounts shown in the Consolidated Statements of Cash Flows:

	December 31,
	2018		2017		2016
Cash and Cash Equivalents	$	790,590	$	609,587	$	558,524
Restricted Cash included in Other Assets	9,506		7,798		17,113
Total Cash, Cash Equivalents and Restricted Cash shown in the Statement of Cash Flows	$	800,096	$	617,385	$	575,637