Other Income, Net - Components of Other Income, Net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Component Of Other Operating Income [Line Items]
Other Nonoperating Income	$ 40	$ 103
Difference on earn-out paid related to MPC acquisition [Member]
Component Of Other Operating Income [Line Items]
Other Nonoperating Income		135
Interest income [Member]
Component Of Other Operating Income [Line Items]
Other Nonoperating Income	83	35
Other [Member]
Component Of Other Operating Income [Line Items]
Other Nonoperating Income	$ (43)	$ (67)