Equity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended					12 Months Ended
	Apr. 10, 2013	Feb. 28, 2013	Apr. 19, 2012	Mar. 01, 2012	Jan. 03, 2012	Dec. 31, 2013 board_member	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Dividends declared (in dollars per share)		$ 0.05		$ 0.05
Dividends paid	$ 916		$ 914			$ 916	$ 914
Number of board members common stock shareholders entitled To elect						4
Total number of board members						9
Number of board members preferred stock shareholders entitled to elect						5
Number of directors elected annually						3
Board of directors, term of service						3 years
Minimum single shareholder ownership percentage to call special stockholder meeting (as a percent)						10.00%
Number of board members required to approve sale or acquisition of business						6
Treasury stock, shares retired (in shares)					1,414,379
Reduction in number of issued shares					1,414,379
Cancellation of treasury stock					$ 7,132		$ 0
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)						10,000	20,000	42,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of nonvested shares (in shares)						569,296	933,887	1,199,661
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of nonvested shares (in shares)						371,502	423,264	0
Ending Balance [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of nonvested shares (in shares)						569,296	933,887