Share Repurchase (Narrative) (Details) (USD $)	3 Months Ended		5 Months Ended	1 Months Ended	5 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013	May 06, 2015	May 06, 2015	Aug. 15, 2013	Dec. 16, 2014
Equity, Class of Treasury Stock [Line Items]
Purchase of treasury shares	$ 3,597,000	$ 0
August 2013 Share Repurchase Agreement [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						7,000,000
Treasury stock, shares acquired		0	127,510
Purchase of treasury shares			1,300,000
December 2014 Share Repurchase Agreement [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount							8,000,000
Treasury stock, shares acquired	357,085
Purchase of treasury shares	3,600,000
Stock repurchase program, remaining authorized repurchase amount	4,400,000
December 2014 Share Repurchase Agreement [Member] | Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury stock, shares acquired				58,495	415,580
Purchase of treasury shares				400,000	4,000,000
Stock repurchase program, remaining authorized repurchase amount				$ 4,000,000	$ 4,000,000