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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract] |
Components of supplemental cash flow information | Supplemental cash flow information is as follows (in thousands):
| Nine months ended September 30,
| 2014 |  | 2013
Supplemental non-cash investing and financing activities: |  |  |
Value of common stock issued in acquisitions | $ | 2,043 |  |  | $ | 52,711 |
Final Florida Chemical acquisition adjustment | 1,162 |  |  | — |
Value of common stock issued in payment of accrued liability | 600 |  |  | — |
Equipment acquired through capital leases | — |  |  | 866 |
Exercise of stock options by common stock surrender | 1,183 |  |  | 2,979 |
Supplemental cash payment information: |  |  |
Interest paid | $ | 1,038 |  |  | $ | 1,410 |
Income taxes paid | 18,393 |  |  | 13,343 |

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