Stock-Based Compensation Plans (Summary Of Activity Related To Company's Restricted Stock) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested share, beginning of period, Shares	84		129
Granted, Shares	50	[1]	41	[1]
Vested, Shares	(5)		(8)
Unvested shares, end of period, Shares	129		162
Weighted-Avg. Grant-Date Fair Value, beginning of period, Unvested Shares	$ 29		$ 19
Weighted-Avg. Grant-Date Fair Value, Granted	$ 44	[1]	$ 37	[1]
Weighted-Avg. Grant-Date Fair Value, Vested	$ 30		$ 24
Weighted-Avg. Grant-Date Fair Value, end of period, Unvested Shares	$ 35		$ 24
Total value of the restricted share grants	$ 2,184		$ 1,532

[1] The total value of the restricted share grants for the nine months ended September 30, 2012 and 2011 was $2,184 and $1,532, respectively.