Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2014

Stock-based compensation plans

Schedule of components of stock compensation expense

	2014		2013		2012
	(in thousands)
2007 Stock Incentive Plan	$	3,459	$	3,393	$	3,092
Employee Stock Purchase Plan		50		46		52
Total Stock Compensation Expense	$	3,509	$	3,439	$	3,144

Summary of information concerning outstanding and exercisable options

	Options Outstanding				Options Exercisable
		Weighted
		Average
		Remaining
	Number	Contractual	Weighted Average		Number	Weighted Average
Exercise Prices	Outstanding	Life (in years)	Exercise Price		Exercisable	Exercise Price
From $9.20 to $9.20	49,000	0.59		9.20	49,000		9.20

Summary of the activity under the 1996 Plan

					Weighted
					Average
					Remaining
	Options		Weighted		Contractual
	Available		Average		Term (in	Aggregate
	for Grant	Options	Exercise Price		years)	Intrinsic Value
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
Options exercised	—	(54,991)		7.96
Options cancelled	—	(6,500)		5.01
Outstanding as of December 31, 2013	—	75,437	$	9.38	1.49	$	601,991
Options exercised	—	(26,437)		9.71
Options cancelled	—	—		—
Outstanding as of December 31, 2014	—	49,000	$	9.20	0.59	$	622,300
Vested and expected to vest at:
December 31, 2014		49,000	$	9.20	0.59	$	622,300
Options exercisable at:
December 31, 2012		136,928	$	8.60	2.23	$	781,692
December 31, 2013		75,437	$	9.38	1.49	$	601,991
December 31, 2014		49,000	$	9.20	0.59	$	622,300

Restricted stock

Stock-based compensation plans

Summary of activity under the 2007 Plan

	Shares
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
Granted in 2013 (vesting over 4 years)	130,000
Granted in 2013 (vesting on first anniversary from date of issuance)	21,408
Cancelled in 2013	(60,110)
Vested in 2013	(258,822)
Restricted stock at December 31, 2013	515,130
Granted in 2014 (vesting over 3 years)	174,500
Granted in 2014 (vesting over 4 years)	13,000
Granted in 2014 (vesting on first anniversary from date of issuance)	50,208
Cancelled in 2014	(5,750)
Vested in 2014	(221,732)
Restricted stock at December 31, 2014	525,356

Summary of activity under the 2007 Plan

		Weighted Average
	Number Outstanding	Grant Date Fair Value		Aggregate Value
Balance as of December 31, 2011	651,294	$	11.79	$	7,680,578
Shares granted	311,040		13.68		4,256,290
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	$	12.83	$	8,756,990
Shares granted	151,408		14.25		2,158,011
Shares cancelled	(60,110)		12.41		(745,876)
Shares vested	(258,822)		12.01		(3,108,651)
Balance as of December 31, 2013	515,130	$	13.71	$	7,060,474
Shares granted	237,708		19.84		4,710,362
Shares cancelled	(5,750)		14.02		(80,630)
Shares vested	(221,732)		13.24		(2,903,595)
Balance as of December 31, 2014	525,356	$	16.72	$	8,786,611