Stock-Based Compensation and Stock Purchase Plans - Long Term Incentive Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
2006 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Issuance of shares of common stock, authorized	1,825,000
Shares authorized to be granted as restricted stock	325,000
2006 Long term Incentive Plan [Member] | Options [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Shares authorized to be granted as stock options or SARs	900,000
2006 Long term Incentive Plan [Member] | Restricted Stock [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Maximum shares of restricted stock that can be granted	175,000
Period of restricted stock grant	3 years
2004 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Issuance of shares of common stock, authorized	1,750,000
Shares authorized to be granted as restricted stock	438,000
2004 Long term Incentive Plan [Member] | Options [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Shares authorized to be granted as stock options or SARs	438,000
2004 Long term Incentive Plan [Member] | Restricted Stock [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Maximum shares of restricted stock that can be granted	110,000
2001 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Issuance of shares of common stock, authorized	1,697,000
Shares grant period	1 year
2001 Long term Incentive Plan [Member] | Options [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Shares authorized to be granted as stock options or SARs	500,000
2010 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Issuance of shares of common stock, authorized	2,725,000
Shares authorized to be granted as restricted stock	700,000
2010 Long term Incentive Plan [Member] | Options [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Shares authorized to be granted as stock options or SARs	1,000,000