Stock Benefit Plans Information Relating to Fair Value of Grants of Equity Awards and the Fair Value of Options Exercised and Restricted Shares Vested (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net issuance of restricted shares	$ (119)
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value on grant date: Options	0	0	27
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value on grant date: Restricted Stock	788	3,977	2,795
Net issuance of restricted shares	$ 2,739	$ 2,797	$ 415