This excerpt taken from the DY 10-K filed Sep 9, 2005.
Pursue Selective Acquisitions. We selectively pursue acquisitions when doing so is operationally and financially beneficial, although we do not solely rely on acquisitions for growth. In particular, we pursue those acquisitions that provide us with incremental revenue and geographic diversification while complementing our existing operations. We generally target for acquisition companies that have defendable leadership positions in their market niches; profitability which meets or exceeds industry averages; proven operating histories; sound management; and certain clearly identifiable cost synergies.