Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

Stock-Based Compensation Plans

Schedule of components of stock compensation expense

	2012		2011		2010
	(in thousands)
2007 Stock Incentive Plan	$	3,092	$	3,108	$	2,603
1996 Stock Option/Stock Issuance Plan	—		—		14
Employee Stock Purchase Plan	52		65		61
Total Stock Compensation Expense	$	3,144	$	3,173	$	2,678

Summary of the activity under the 1996 Plan

	Options Available for Grant	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding as of January 1, 2010	—	1,019,788		$	6.68	2.53	$	8,486,579
Options exercised	—	(206,146	)	6.20
Options cancelled	—	(751	)	6.50
Outstanding as of December 31, 2010	—	812,891		$	6.80	1.81	$	5,064,940
Options exercised	—	(369,310	)	7.34
Options cancelled	—	—		—
Outstanding as of December 31, 2011	—	443,581		$	6.35	1.82	$	2,484,009
Options exercised	—	(306,653	)	5.34
Options cancelled	—	—		—
Outstanding as of December 31, 2012	—	136,928		$	8.60	2.23	$	781,692
Vested and expected to vest at: December 31, 2012		136,928		$	8.60	2.23	$	781,692
Options exercisable at:
December 31, 2010		812,891		$	6.80	1.81	$	5,064,940
December 31, 2011		443,581		$	6.35	1.82	$	2,484,009
December 31, 2012		136,928		$	8.60	2.23	$	781,692

Summary of information concerning outstanding and exercisable options

	Options Outstanding				Options Exercisable
Exercise Prices	Number Outstanding	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
From $4.92 to $4.92	3,850	0.41	4.92		3,850	4.92
From $5.01 to $5.01	18,875	0.17	5.01		18,875	5.01
From $8.40 to $8.40	3,921	2.38	8.40		3,921	8.40
From $8.49 to $8.49	3,890	1.40	8.49		3,890	8.49
From $8.70 to $8.70	4,281	3.40	8.70		4,281	8.70
From $9.20 to $9.20	91,516	2.59	9.20		91,516	9.20
From $11.24 to $11.24	10,595	3.25	11.24		10,595	11.24
From $4.50 to $11.24	136,928	2.23	$	8.60	136,928	$	8.60

Restricted stock

Stock-based compensation plans

Summary of activity under the 2007 Plan

	Shares
Restricted stock at December 31, 2009	558,304
Granted in 2010 (vesting over 4 years)	190,375
Granted in 2010 (vesting on first anniversary from date of issuance)	21,635
Cancelled in 2010	—
Vested in 2010	(194,523	)
Restricted stock at December 31, 2010	575,791
Granted in 2011 (vesting over 4 years)	324,924
Granted in 2011 (vesting on first anniversary from date of issuance)	22,100
Cancelled in 2011	(27,477	)
Vested in 2011	(244,044	)
Restricted stock at December 31, 2011	651,294
Granted in 2012 (vesting over 4 years)	283,000
Granted in 2012 (vesting on first anniversary from date of issuance)	28,040
Cancelled in 2012	(8,988	)
Vested in 2012	(270,692	)
Restricted Stock at December 31, 2012	682,654

Summary of activity under the 2007 Plan

	Number Outstanding		Weighted Average Grant Date Fair Value		Aggregate Value
Balance as of January 1, 2010	558,304		$	11.14	$	6,217,214
Shares granted	212,010		11.19		2,371,619
Shares cancelled	—		—		—
Shares vested	(194,523	)	11.89		(2,312,649		)
Balance as of December 31, 2010	575,791		$	10.90	$	6,276,184
Shares granted	347,024		12.45		4,318,920
Shares cancelled	(27,477	)	11.34		(311,596		)
Shares vested	(244,044	)	11.14		(2,719,232		)
Balance as of December 31, 2011	651,294		$	11.61	$	7,564,276
Shares granted	311,040		8.55		2,659,170
Shares cancelled	(8,988	)	12.52		(112,521		)
Shares vested	(270,692	)	11.33		(3,067,357		)
Balance as of December 31, 2012	682,654		$	11.61	$	7,043,568