Issued and Outstanding Stock Options (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Long-Term Stock Incentive Plans:
Options outstanding at the beginning of period	2,259,335	3,581,752
Granted	0	0
Exercised	0	0
Forfeited	(8,799)	(353,417)
Expired	0	0
Options outstanding at the end of period	2,250,536	3,228,335
Options exercisable at the end of the period	2,250,536	3,228,335
Options outstanding at the beginning of period, weighted average exercise price	$ 15.35	$ 15.44
Granted	$ 0	$ 0
Exercised	$ 0	$ 0
Forfeited	$ 14.80	$ 14.94
Expired	$ 0	$ 0
Options outstanding at the end of period, weighted average exercise price	$ 15.35	$ 15.49
Options exercisable at the end of the period, exercise price	$ 15.35	$ 15.49