Employee Benefits and Stock Compensation - Summary of Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Shares granted		63,650	413,000	49,200
Weighted-average grant date fair value		$ 2.21	$ 2.26	$ 3.10
Restricted Stock [Member]
Shares granted		250,934,000	27,692,000	195,000,000
Weighted-average grant date fair value		$ 13.42	$ 10.19	$ 11.00
Fair value of awards vested	[1]	$ 836	$ 1,455	$ 133

[1] Based on grant date fair value