New Accounting Pronouncements Restricted Cash Table (Tables)

3 Months Ended

Mar. 31, 2018

Restricted Cash Equivalents [Abstract]

Restrictions on Cash and Cash Equivalents [Table Text Block]

	March 31, 2018		December 31, 2017
Cash and cash equivalents	$	160,861	$	67,562
Restricted cash held in escrow for like-kind exchange	59,196		116,405
Restricted cash included in other escrow deposits and other assets	8,306		9,660
Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows	$	228,363	$	193,627