Employee Benefits - Options Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in outstanding options - Number of Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance	362,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	292,757	362,500
Employee And Directors Time Based Options
Changes in outstanding options - Number of Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance	1,096,774	1,099,264
Shares granted	162,500	14,042
Shares forfeited or expired	(7,267)	(2,366)
Shares exercised	(170,106)	(14,166)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	1,081,901	1,096,774	1,099,264
Shares exercisable - Number of Options	872,641	1,020,743
Changes in outstanding options - Weighted-Average Exercise Price
Shares under option - beginning balance (in dollars per share)	$ 9.28	$ 9.19
Shares granted (in dollars per share)	12.65	15.70
Shares forfeited or expired (in dollars per share)	(9.54)	(10.24)
Shares exercised (in dollars per share)	(9.02)	(8.25)
Shares under option - ending balance (in dollars per share)	9.82	9.28	$ 9.19
Shares exercisable (in dollars per share)	$ 9.18	$ 9.14
Average Remaining Contractual Term (In Years)
Shares under option	3 years 10 months 24 days	3 years 8 months 12 days	4 years 7 months 6 days
Shares exercisable (In Years)	2 years 7 months 6 days	3 years 4 months 24 days