Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended
	Jul. 25, 2013	Apr. 11, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock	4,500,000	4,000,000
Common stock, price per share	$ 18.00	$ 13.00
Common stock, shares authorized to the underwriters	675,000	600,000
Exercise period given to the underwriters	30 days	30 days
Common stock, shares authorized purchased by the underwriters		600,000	23,528,038	18,244,179		675,000
Net proceeds from the issuance of common stock	$ 88,043	$ 56,300	$ 88,043	$ 56,566
Shares available for future grants under 2004 Incentive Stock Plan			1,173,664
Compensation expense, recognition period			1 year 8 months 12 days
Performance-based awards outstanding			607,500,000	747,500,000
Stock-based compensation expense			2,527	2,166	2,012
Total unrecognized compensation cost			4,116
Stock option expiration period			10 years
Options granted			0	0
Estimated forfeiture rate used for recording stock-based compensation expense			5.00%
Fair value of options vested			588	1,239	1,213
Exercised, Aggregate Intrinsic Value			232	245
Cash received from the options exercised			125	305
Cash tax benefits realized from stock awards exercised			88	93
Options exercised during 2011			15,000,000		0
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			3 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			3 years
Performance-based awards outstanding			361,149
Award options earned on achievement of EBITDA targets			230,750
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options vested			1,617	990	296
Vice President [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			90 days
Stock-based compensation expense				115
Executive Vice President [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 222
Minimum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			1 year
Compensation expense, recognition period			1 year
Maximum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			3 years
Compensation expense, recognition period			3 years