XML 51 R32.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Stockholders' Equity (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2017
Stockholders' Equity Note [Abstract] |
Restricted share activity | Restricted stock awards (RSAs), performance stock awards (PSAs) and performance stock units (PSUs) activity for the six months ended June 30, 2017 is summarized below:
| Restricted Stock Awards |  | Performance Stock Awards |  | Performance Stock Units |  | Total |  | Weighted Average Grant Date Fair Value
Unvested balance, December 31, 2016 | 577,244 |  |  | 345,656 |  |  | — |  |  | 922,900 |  |  | $ | 58.15 |
Granted | 377,076 |  |  | — |  |  | 231,100 |  |  | 608,176 |  |  | 56.98 |
Vested | (380,812 | ) |  | (260,894 | ) |  | (139,272 | ) |  | (780,978 | ) |  | 57.63 |
Forfeited | (58,643 | ) |  | — |  |  | — |  |  | (58,643 | ) |  | 54.48 |
Unvested balance, June 30, 2017 | 514,865 |  |  | 84,762 |  |  | 91,828 |  |  | 691,455 |  |  | 57.57 |

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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