XML 68 R48.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Employee Service Share Based Compensation Aggregate Disclosures [Abstract] |
Summary of Information Regarding the Common Shares Issued Under the ESPP | The following table summarizes information regarding the Common Shares issued under the ESPP (the net proceeds noted below were contributed to ERPOP in exchange for OP Units):
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
|  | (Amounts in thousands except share and per share amounts) |
Shares issued |  |  | 68,286 |  |  |  | 63,909 |  |  |  | 68,462 |
Issuance price ranges |  | $52.79 – $58.06 |  |  | $51.85 – $63.37 |  |  | $63.70 – $65.90 |
Issuance proceeds |  | $3,744 |  |  | $3,686 |  |  | $4,404 |

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

X
- Definition Tabular disclosure of employee stock purchase plan activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationEmployeeStockPurchasePlanActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration