Shareholders' Equity (Summary of the Company's Common and Preferred Stock) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	48,468,894	46,881,108
Preferred stock, shares authorized	20,000,000	20,000,000
Common stock
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	48,468,894	46,881,108
Common stock, shares outstanding	48,383,279	46,805,055
Common stock, cash dividend per share	$ 0.44	$ 0.40
Preferred stock
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	5,126,287	126,467
Preferred stock, shares outstanding	5,126,287	126,467