XML 55 R23.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Supplemental Cash Flow Information (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Supplemental Cash Flow Elements [Abstract] |
Components of supplemental cash flow information | Supplemental cash flow information is as follows (in thousands):
| Three months ended March 31,
| 2013 |  | 2012
Supplemental non-cash investing and financing activities: |  |  |
Equipment acquired through capital leases | $ | 480 |  |  | $ | 671 |
Exercise of stock options by common stock surrender | 2,357 |  |  | — |
Supplemental cash payment information: |  |  |
Interest paid | $ | 381 |  |  | $ | 2,621 |
Income taxes paid | 3,537 |  |  | 4,224 |

X
- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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