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Supplemental Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flows
Income taxes	$ 18,115	$ 16,926	$ 9,151
Interest expense	571	670	524
Noncash investing activities:
Acquisition of property and equipment for which payment is pending	$ 804	$ 390	$ 901

X

- Definition

Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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