Stock-Based Compensation (Peformance-Based RSU Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Performance-based RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Targeted Number of Units Outstanding	165,768	196,091	111,333
Types of performance-based RSUs	2
Summary of all performance-based RSU activity
Outstanding at beginning of year (number of shares)	782,000
Granted, (number of shares)	196,000
Forfeited, (number of shares)	(129,000)
Outstanding at end of year (number of shares)	755,000	782,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash Paid for RSU Vesting and Dividend Payments	$ 1,100
Chief Executive Officer [Member] | Performance-based RSU [Member]
Summary of all performance-based RSU activity
Granted, (number of shares)		281,532
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		5 years
Interim measurement dates	each of the third, fourth and fifth anniversaries