Stock and Incentive Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Plan Activity

The following table summarizes the Stock Plan activity for the periods presented:

	Three Months Ended June 30, 2017
	Performance Awards			Time-Vested Awards
Nonvested shares, beginning of period		229,994			325,684
Granted		—			15,000
Released from restriction		(3,606	)		(10,790	)
Forfeited		(6,250	)		(430	)
Nonvested shares, end of period		220,138			329,464

	Six Months Ended June 30, 2017
	Performance Awards			Time-Vested Awards
Nonvested shares, beginning of period		237,136			322,056
Granted		58,406			103,224
Released from restriction		(66,207	)		(94,652	)
Forfeited		(9,197	)		(1,164	)
Nonvested shares, end of period		220,138			329,464

Compensation Expense for Awards Under Stock Plan

The following table presents information regarding compensation expense for awards under the Stock Plan for the periods presented ($ in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Performance awards	$	419	$	307	$	524	$	407
Time-vested awards		802		532		1,650		1,393
Total compensation expense	$	1,221	$	839	$	2,174	$	1,800