XML 55 R44.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Earnings per share (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2012
Earnings per share |
Schedule of earnings per share |
|  | Three months ended June 30 |  | Six months ended June 30 |
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |
|  | Basic and diluted |  | Basic and diluted |  | Basic and diluted |  | Basic and diluted |
Distributed earnings |  | $ | 0.31 |  | $ | 0.31 |  | $ | 0.62 |  | $ | 0.62 |
Undistributed earnings (loss) |  | 0.09 |  | (0.03 | ) | 0.18 |  | (0.04 | )
|  | $ | 0.40 |  | $ | 0.28 |  | $ | 0.80 |  | $ | 0.58 |

X
- Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration