XML 52 R58.htm IDEA: XBRL DOCUMENT

Summary of Share-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock option awards	$ 612	$ 950	$ 2,518	$ 3,108
Common, deferred, restricted and restricted unit awards	398	332	2,263	1,125
Share-based compensation			4,781	4,233
Allocated Share-based Compensation Expense	2,105	1,447	6,325	5,023
Equity-classified awards:
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	1,010	1,282	4,781	4,233
Liability-classified awards
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation	$ 1,095	$ 165	$ 1,544	$ 790

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References+ Details

- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

+ References+ Details