Face (par) amount of debt instrument at time of issuance.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Condensed Consolidating Financial Information - Narrative (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Senior Notes [Member]	Dec. 31, 2013 Senior Notes [Member]	May 13, 2013 China Merchants Bank Co. (CMB) [Member] Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Principal amount of debt					$ 175,000,000
Carrying value of long-term debt and lease obligations	$ 241,013,000	$ 220,152,000	$ 175,000,000	$ 175,000,000
Stated rate on debt					8.125%