Stock-Based Compensation and Stock Awards - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended
May 10, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based compensation expense		$ 2,800,000	$ 2,000,000	$ 5,660,000	$ 4,136,000
Capitalized expense		$ 0	$ 0	$ 0	$ 0
Stock options or stock awards granted		0	0
Restricted stock vested	1,602

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration