Statement of Cash Flows (Tables)

6 Months Ended

Jun. 30, 2018

Supplemental Cash Flow Information [Abstract]

Restrictions on Cash and Cash Equivalents [Table Text Block]

The following provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheet to the total of the same such amounts shown in the Condensed Consolidated Statement of Cash Flows:

	June 30,		June 30,
	2018		2017
Cash and cash equivalents	$	917,876	$	744,313
Restricted cash included in Other noncurrent assets	12,500		12,500
Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statement of Cash Flows	$	930,376	$	756,813