Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2016

Stock-based compensation plans

Schedule of components of stock compensation expense

	2016		2015		2014
	(in thousands)
2007 Stock Incentive Plan	$	3,681	$	4,102	$	3,459
Employee Stock Purchase Plan		36		48		50
Total Stock Compensation Expense	$	3,717	$	4,150	$	3,509

Restricted stock

Stock-based compensation plans

Summary of activity under the 2007 Plan

	Shares
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
Granted in 2015 (vesting over 3 years)	125,000
Granted in 2015 (vesting over 4 years)	5,000
Granted in 2015 (vesting on first anniversary from date of issuance)	16,440
Cancelled in 2015	—
Vested in 2015	(275,201)
Restricted stock at December 31, 2015	396,595
Granted in 2016 (vesting over 2 years)	20,000
Granted in 2016 (vesting over 3 years)	85,000
Granted in 2016 (vesting over 4 years)	13,250
Granted in 2016 (vesting on first anniversary from date of issuance)	18,395
Cancelled in 2016	(20,377)
Vested in 2016	(213,528)
Restricted stock at December 31, 2016	299,335

Summary of activity under the 2007 Plan

		Weighted Average		Aggregate Grant
	Number Outstanding	Grant Date Fair Value		Date Fair Value
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	$	13.71	$	8,786,611
Shares granted	146,440		18.53		2,713,159
Shares cancelled	—		—		—
Shares vested	(275,201)		15.87		(4,368,570)
Balance as of December 31, 2015	396,595	$	17.98	$	7,131,200
Shares granted	136,645		21.55		2,944,941
Shares cancelled	(20,377)		17.79		(362,536)
Shares vested	(213,528)		17.12		(3,655,269)
Balance as of December 31, 2016	299,335	$	20.24	$	6,058,336