Stock-Based Compensation - Stock Granted to Our Non-employee Directors (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended	1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jan. 31, 2014 Director [Member]	Jan. 31, 2013 Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares	0	0	25,310	29,205
Fair Value per Share			$ 8.89	$ 7.55
Fair Value of Grant			$ 226	$ 221