XML 26 R16.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Cash Dividends | 3 Months Ended
--- | ---
Dec. 31, 2017
Cash Dividends |
Cash Dividends | 7.Cash Dividends The $0.70 per share cash dividend declared September 6, 2017, was paid December 1, 2017. On December 5, 2017, a cash dividend of $0.70 per share was declared for shareholders of record on February 12, 2018, payable March 1, 2018. The dividend payable is included in accounts payable in the Consolidated Condensed Balance Sheets.

X
- Definition The entire disclosure for cash dividends. + References No definition available. + Details
Name: | hp_CashDividendsDisclosureTextBlock
Namespace Prefix: | hp_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration