Note 19 - Equity Incentive Plans (Details) - Tax Short-fall from Share-based Payment Arrangements (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Tax Short-fall from Share-based Payment Arrangements [Abstract]
Short-fall of tax deductions in excess of grant-date fair value	$ (1,285)	$ (2,509)	$ (620)
Benefit of tax deductions on grant-date fair value	1,292	4,172	747
Total benefit of tax deductions	$ 7caty_TotalBenefitOfTaxDeductions	$ 1,663caty_TotalBenefitOfTaxDeductions	$ 127caty_TotalBenefitOfTaxDeductions

Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

-Paragraph 24

-URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration