Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share-based Compensation [Abstract]

Details of Compensation Expense

(Dollars in thousands)

	2011		2010		2009
Employee equity-based compensation expense:
Performance shares	3,821		3,368		3,286
Restricted stock units	583		584		543
Total employee equity-based compensation expense	$	4,404	$	3,952	$	3,829
Director deferred compensation expense	$	619	$	946	$	1,484

Summary of Outstanding Stock Options

A summary of the status of outstanding stock options as of December 31, 2011, 2010 and 2009 and changes during those years is presented below:

	2011					2010					2009
	SHARES			WEIGHTED AVG. EXERCISE PRICE		SHARES			WEIGHTED AVG. EXERCISE PRICE		SHARES			WEIGHTED AVG. EXERCISE PRICE
Outstanding at January 1	222,130			$	21.64	329,426			$	21.14	412,001			$	21.44
Shares exercised	(77,446		)	18.47		(107,296		)	20.10		(81,540		)	22.56
Canceled or expired	—			—		—			—		(1,035		)	30.92
Outstanding and exercisable at December 31	144,684			23.34		222,130			21.64		329,426			21.14
Total intrinsic value of options exercised during the year (in thousands)	$	1,496				$	1,609				$	561

Summary of Outstanding Stock Options by Exercise Price Range

The following table summarizes information about stock options outstanding at December 31, 2011:

	OPTIONS OUTSTANDING AND EXERCISABLE
RANGE OF OPTION PRICES	NUMBER OUTSTANDING AT 12/31/11	WEIGHTED AVERAGE REMAINING CONTRACTUAL LIFE		WEIGHTED AVERAGE OPTION PRICE		AGGREGATE INTRINSIC VALUE (IN THOUSANDS)
$13.8594 to $14.4398	35,844	0.94	years	$	14.30
$19.2569	42,995	1.92	years	19.26
$30.9204	65,845	2.92	years	30.92
$13.8594 to $30.9204	144,684	2.13	years	23.34		$	1,125

Fair Value of Performance Share Awards

The following table presents the key inputs used in calculating the fair value of the performance share awards in 2011, 2010 and 2009, and the resulting fair values:

	2011			2010			2009
Shares granted	77,767			81,162			112,269
Stock price as of valuation date	$	39.10		$	31.88		$	24.30
Risk-free rate	1.26		%	1.29		%	1.18		%
Fair value of a performance share	$	55.84		$	45.30		$	33.32

Summary of Outstanding Performance Share Awards

The following table summarizes outstanding performance share awards as of December 31, 2011, 2010 and 2009, and changes during those years:

(Dollars in thousands – except per-share amounts)

	2011					2010					2009
	SHARES			WEIGHTED AVG. GRANT DATE FAIR VALUE		SHARES			WEIGHTED AVG. GRANT DATE FAIR VALUE		SHARES			WEIGHTED AVG. GRANT DATE FAIR VALUE
Unvested shares outstanding at January 1	184,601			$	38.45	171,595			$	40.04	131,108			$	50.51
Granted	77,767			55.84		81,162			45.30		112,269			33.32
Vested	(103,960		)	33.32		(57,291		)	52.75		(71,719		)	48.66
Forfeited	(3,814		)	42.77		(10,865		)	39.24		(63		)	47.90
Unvested shares outstanding at December 31	154,594			50.54		184,601			38.45		171,595			40.04
Total grant date fair value of share awards vested during the year	$	3,464				$	3,022				$	3,490
Aggregate intrinsic value of unvested share awards at December 31	$	4,747				$	5,752				$	4,890

Summary of Outstanding RSU Awards

A summary of the status of outstanding RSU awards as of December 31, 2011, 2010 and 2009, and changes during these years is presented below:

	2011					2010					2009
	SHARES			WEIGHTED AVERAGE GRANT DATE FAIR VALUE		SHARES			WEIGHTED AVERAGE GRANT DATE FAIR VALUE		SHARES			WEIGHTED AVERAGE GRANT DATE FAIR VALUE
Unvested shares outstanding at January 1	41,715			$	29.37	41,559			$	32.57	39,711			$	45.38
Granted	18,053			38.57		21,559			33.17		21,720			24.34
Vested	(21,510		)	26.26		(16,639		)	42.23		(19,872		)	49.18
Forfeited	(1,899		)	32.78		(4,764		)	29.56		—			—
Unvested shares outstanding at December 31	36,359			35.60		41,715			29.37		41,559			32.57
Total grant date fair value of RSU awards vested during the year (in thousands)	$	565				$	703				$	977
Aggregate intrinsic value of unvested RSU awards at December 31 (in thousands)	$	1,131				$	1,395				$	1,325