Stock Plans (Options Outstanding) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Shares Subject to Option [Roll forward]
Balance at beginning of period (in shares)	83,000
Options granted (in shares)		0
Options exercised (in shares)
Options canceled, forfeited or lapsed (in shares)
Balance at end of period (in shares)	83,000		83,000
Exercisable at end of period (in shares)	83,000
Weighted Average Option Price Per Share [Abstract]
Balance at beginning of period (in dollars per share)	$ 13.23
Options granted (in dollars per share)
Options exercised (in dollars per share)
Options canceled, forfeited or lapsed (in dollars per share)
Balance at end of period (in dollars per share)	$ 13.23		$ 13.23
Weighted Average Remaining Life in Years [Abstract]
Balance at beginning of period	1 year 7 months 6 days		1 year 9 months 18 days
Balance at end of period	1 year 7 months 6 days		1 year 9 months 18 days
Exercisable at end of period	1 year 7 months 6 days
Aggregate Intrinsic Value [Abstract]
Balance at beginning of period
Balance at end of period		0
Exercisable at end of period		$ 0