Schedule of Weighted Average Shares Outstanding (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Weighted average number of shares outstanding - basic	33,018	32,301	31,247
Stock options	0	1	0
Non-vested stock and stock units	0	521	0
Weighted average number of shares outstanding - diluted	33,018	32,823	31,247
Anti-dilutive securities	922	106	688