Equity Plans (Tables)

6 Months Ended

Jun. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

A summary of compensation costs charged to income, proceeds from the exercise of stock options and similar instruments, and the tax benefit realized from stock options and similar instruments exercised, that were recorded to additional paid-in capital and common stock, by award type, are presented below for the three and six months ended June 30, 2016 and 2015.

	Three months ended June 30,			Six months ended June 30,
	2016		2015	2016		2015
Adjustments to additional paid-in capital and common stock for:
Compensation costs charged to income:
ESPP	$	—	—	$	79	76
Restricted stock and deferred restricted stock	379		362	773		685
Total compensation costs charged to income	$	379	362	$	852	761
Excess tax benefits realized from stock issuance:
Restricted stock and deferred restricted stock	$	94	108	$	202	634
Total excess tax benefits realized from stock issuance	$	94	108	$	202	634
Proceeds from ESPP and similar instruments:
ESPP	$	—	—	$	451	433
Total proceeds from the ESPP and similar instruments	$	—	—	$	451	433