Equity Plans (Tables)

3 Months Ended

Mar. 31, 2013

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 months ended March 31, 2013 and 2012.

	Three months ended March 31,
	2013		2012
Compensation costs charged to income:
ESPP	$	58	49
Restricted stock and deferred restricted stock	289		134
Total compensation costs charged to income	$	347	183
Excess tax benefits realized from share options exercised and stock issuance:
Restricted stock and deferred restricted stock	$	30	—
Total excess tax benefits realized from share options exercised and stock issuance	$	30	—
Proceeds from the exercise of stock options and similar instruments:
DRSPP	$	17	31
ESPP	328		278
Total proceeds from the exercise of stock options and similar instruments	$	345	309