Share-Based Compensation Changes in nonvested shares (Tables)

12 Months Ended

Dec. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

A summary of changes in Park's nonvested shares for the year ended December 31, 2016 follows:

	Shares
Nonvested at January 1, 2016	44,700
Granted	41,550
Vested	—
Forfeited	825
Nonvested at December 31, 2016	85,425