Statements of Cash Flow	3 Months Ended
Mar. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Statements of Cash Flow	Statements of Cash FlowsInterest payments were $62,981,000 and $61,890,000 for the three months ended March 31, 2019 and 2018, respectively. No income taxes were paid during such periods.

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-URI http://asc.fasb.org/topic&trid=2134446

Name:	us-gaap_CashFlowSupplementalDisclosuresTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration