Goodwill And Other Intangible Assets (Narrative) (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Goodwill, Period Increase (Decrease)			$ 25,000
Amortization expense	$ 669,000	$ 375,000	$ 1,338,000	$ 751,000
Minimum [Member]
Intangible assets amortized estimated useful lives			7 years
Maximum [Member]
Intangible assets amortized estimated useful lives			15 years