Share-Based Compensation - Summary Of Other Information Of Stock Option Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total grant-date fair value of stock awards granted	$ 4,027	$ 4,268	$ 3,412
Total fair value of stock awards vested during period	2,719	2,051	1,897
Total unrecognized compensation expense related to non-vested stock awards	$ 7,108	$ 6,492	$ 4,963